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# 87

Number 87 (eighty-seven) is an odd two-digits composite number and natural number following 86 and preceding 88.

## Properties of the number 87

 Nominal 87 Cardinal eighty-seven Ordinal 87th Number of digits 2 Sum of digits 15 Product of digits 56 Number parity Odd
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## Prime Factorization of 87

 Prime factorization 3 x 29 Prime factors 3, 29 Number of distinct prime factors ω(n) 2 Total number of prime factors Ω(n) 2 Sum of prime factors 32 Product of prime factors 87
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## Divisors of 87

 List of proper divisors 1, 3, 29 List of all dividers 1, 3, 29, 87 Number of divisors d(n) 4 Sum of all divisors σ(n) 120 Aliquot sum 33 87 is a deficient number , since it is larger than the sum of its proper divisors (33). Its deficiency is 54.
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## Prime numbers

 Is 87 a prime number? No Is 87 a semiprime number? Yes Is 87 a Chen prime number? No Is 87 a Mersenne prime number? No
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## Sequences

 Is 87 a Catalan number? No Is 87 a Fibonacci number? No Is 87 a Idoneal number? No
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 87 is not a Happy number 87 is not a Humble number 87 is not a Münchhausen number 87 is not a Perfect number 87 is not a Perfect square 87 is not a Palindrome
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## Numeric Bases of 87

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary10101112
3Ternary100203
4Quaternary11134
5Quinary3225
6Senary2236
7Septenary1537
8Octal1278
9Nonary1069
10Decimal87
12Duodecimal7312
20Vigesimal4720
36Base362f36
60Sexagesimal1R60
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 87 (n2) 7569 Cube of 87 (n3) 658503 Square root of 87 9.32738 Natural Logarithm (ln) of 87 4.46591 Decimal Logarithm (log) of 87 1.93952
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 87 -0.821818 Cosecant of 87 -1.21681 Cosine of 87 0.56975 Secant of 87 1.75515 Tangent of 87 -1.44242 Cotangent of 87 -0.693281
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## Number parity

Parity is the property of an integer of whether it is even or odd.

No

### Is 87 an Odd Number?

Yes, the number 87 is an odd number.
Total number of all odd numbers from 1 to 87 is 44
Sum of all the odd numbers from 1 to 87 are 1936
The sum of all odd numbers is a perfect square: 1936 = 44
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 87 in words is "eighty-seven", meaning that: 87 is an aban number (a number without the letter a) 87 is not an eban number (as it contains the letter e) 87 is not an iban number (as it contains the letter i) 87 is an oban number (a number without the letter o) 87 is not a tban number (as it contains the letter t) 87 is an uban number (a number without the letter u)
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## Numeral systems

How to write 87 in other number systems?
 Bengali numerals ৮৭ Eastern Arabic numerals ٨٧ Hieroglyphs numeralsused in Ancient Egypt 𓎍𓐀 Khmer numerals ៨៧ Japanese numerals 八十七 Roman numerals LXXXVII Thai numerals ๘๗
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## Translation

How do you say 87 in 38 different languages?
 Arabic سبعة و ثمانون Croatian osamdeset i sedam Czech osmdesát sedm Danish syv og firs Dutch zevenentachtig Estonian blaenyi vɔ adre Faroese áttati­sjey Filipino walóng pû’t pitó Finnish kahdeksan­kymmentä­seitsemän French quatre-vingt-sept Greek ογδόντα επτά German sieben­und­achtzig Hebrew שמונים ושבע Hindi सत्तासी Hungarian nyolcvan­hét Icelandic áttatíu og sjó Indonesian delapan puluh tujuh Italian ottantasette Japanese 八十七 Korean 팔십칠 Latvian astoņdesmit septiņi Lithuanian aštuoniasdešimt septyni Norwegian åtti­sju Persian هشتاد و هفت Polish osiemdziesiąt siedem Portuguese oitenta e sete Romanian optzeci şi şapte Russian восемьдесят семь Serbian осамдесет и седам Slovak osemdesiat­sedem Slovene osemdeset sedem Spanish ochenta y siete Swahili themanini na saba Swedish åttiosju Thai แปด​สิบ​เจ็ด Turkish seksen yedi Ukrainian вісімдесят сім Vietnamese tám mươi bảy
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## Miscellaneous

 Number 87 reversed 78 ASCII Code 87 W Unicode Character U+0057 W Unix Timestamp Thu, 01 Jan 1970 00:01:27 +0000
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