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

Properties of the number 87

Number of digits2
Sum of digits15
Product of digits56
Number parityOdd
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Prime Factorization of 87

Prime factorization3 x 29
Prime factors3, 29
Number of distinct prime factors ω(n)2
Total number of prime factors Ω(n)2
Sum of prime factors32
Product of prime factors87
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Divisors of 87

List of proper divisors 1, 3, 29
List of all dividers1, 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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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.
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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 879.3273790530888
Natural Logarithm (ln) of 874.4659081186546
Decimal Logarithm (log) of 871.9395192526186
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 87-0.82181783663082
Cosecant of 87-1.2168146703893
Cosine of 870.56975033426531
Secant of 871.7551547403469
Tangent of 87-1.4424174716642
Cotangent of 87-0.69328056519325
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Number parity

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

Is 87 an Even Number?


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 numerals৮৭
Eastern Arabic numerals٨٧
Hieroglyphs numeralsused in Ancient Egypt𓎍𓐀
Khmer numerals៨៧
Japanese numerals八十七
Roman numeralsLXXXVII
Thai numerals๘๗
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How do you say 87 in 38 different languages?
Arabicسبعة و ثمانون
Croatianosamdeset i sedam
Czechosmdesát sedm
Danish syv og firs
Estonianblaenyi vɔ adre
Filipinowalóng pû’t pitó
Greekογδόντα επτά
Hebrewשמונים ושבע
Icelandicáttatíu og sjó
Indonesiandelapan puluh tujuh
Latvianastoņdesmit septiņi
Lithuanianaštuoniasdešimt septyni
Persianهشتاد و هفت
Polishosiemdziesiąt siedem
Portugueseoitenta e sete
Romanianoptzeci şi şapte
Russianвосемьдесят семь
Serbianосамдесет и седам
Sloveneosemdeset sedem
Spanish ochenta y siete
Swahilithemanini na saba
Turkishseksen yedi
Ukrainianвісімдесят сім
Vietnamesetám mươi bảy
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Number 87 reversed78
Unicode CharacterU+0057W
Unix TimestampThu, 01 Jan 1970 00:01:27 +0000
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