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# 85

Number 85 (eighty-five) is an odd two-digits composite number and natural number following 84 and preceding 86.

## Properties of the number 85

 Nominal 85 Cardinal eighty-five Ordinal 85th Number of digits 2 Sum of digits 13 Product of digits 40 Number parity Odd
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## Prime Factorization of 85

 Prime factorization 5 x 17 Prime factors 5, 17 Number of distinct prime factors ω(n) 2 Total number of prime factors Ω(n) 2 Sum of prime factors 22 Product of prime factors 85
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## Divisors of 85

 List of proper divisors 1, 5, 17 List of all dividers 1, 5, 17, 85 Number of divisors d(n) 4 Sum of all divisors σ(n) 108 Aliquot sum 23 85 is a deficient number , since it is larger than the sum of its proper divisors (23). Its deficiency is 62.
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## Prime numbers

 Is 85 a prime number? No Is 85 a semiprime number? Yes Is 85 a Chen prime number? No Is 85 a Mersenne prime number? No
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## Sequences

 Is 85 a Catalan number? No Is 85 a Fibonacci number? No Is 85 a Idoneal number? Yes: I33
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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.
 85 is not a Happy number 85 is not a Humble number 85 is not a Münchhausen number 85 is not a Perfect number 85 is not a Perfect square 85 is not a Palindrome
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## Numeric Bases of 85

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
2Binary10101012
3Ternary100113
4Quaternary11114
5Quinary3205
6Senary2216
7Septenary1517
8Octal1258
9Nonary1049
10Decimal85
12Duodecimal7112
20Vigesimal4520
36Base362d36
60Sexagesimal1P60
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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 85 (n2) 7225 Cube of 85 (n3) 614125 Square root of 85 9.21954 Natural Logarithm (ln) of 85 4.44265 Decimal Logarithm (log) of 85 1.92942
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 85 -0.176076 Cosecant of 85 -5.67938 Cosine of 85 -0.984377 Secant of 85 -1.01587 Tangent of 85 0.17887 Cotangent of 85 5.59065
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## Number parity

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

No

### Is 85 an Odd Number?

Yes, the number 85 is an odd number.
Total number of all odd numbers from 1 to 85 is 43
Sum of all the odd numbers from 1 to 85 are 1849
The sum of all odd numbers is a perfect square: 1849 = 43
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 85 in words is "eighty-five", meaning that: 85 is an aban number (a number without the letter a) 85 is not an eban number (as it contains the letter e) 85 is not an iban number (as it contains the letter i) 85 is an oban number (a number without the letter o) 85 is not a tban number (as it contains the letter t) 85 is an uban number (a number without the letter u)
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## Numeral systems

How to write 85 in other number systems?
 Bengali numerals ৮৫ Eastern Arabic numerals ٨٥ Hieroglyphs numeralsused in Ancient Egypt 𓎍𓏾 Khmer numerals ៨៥ Japanese numerals 八十五 Roman numerals LXXXV Thai numerals ๘๕
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## Translation

How do you say 85 in 38 different languages?
 Arabic خمسة و ثمانون Croatian osamdeset i pet Czech osmdesát pět Danish fem og firs Dutch vijfentachtig Estonian blaenyi vɔ atɔ̃ Faroese áttati­fimm Filipino walóng pû’t limá Finnish kahdeksan­kymmentä­viisi French quatre-vingt-cinq Greek ογδόντα πέντε German fünf­und­achtzig Hebrew שמונים וחמש Hindi पचासी Hungarian nyolcvan­öt Icelandic áttatíu og fimm Indonesian delapan puluh lima Italian ottantacinque Japanese 八十五 Korean 팔십오 Latvian astoņdesmit pieci Lithuanian aštuoniasdešimt penki Norwegian åtti­fem Persian هشتاد و پنج Polish osiemdziesiąt pięć Portuguese oitenta e cinco Romanian optzeci şi cinci Russian восемьдесят пять Serbian осамдесет и пет Slovak osemdesiat­päť Slovene osemdeset pet Spanish ochenta y cinco Swahili themanini na tano Swedish åttiofem Thai แปด​สิบ​ห้า Turkish seksen beş Ukrainian вісімдесят пʼять Vietnamese tám mươi lăm
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## Miscellaneous

 Number 85 reversed 58 ASCII Code 85 U Unicode Character U+0055 U Unix Timestamp Thu, 01 Jan 1970 00:01:25 +0000
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