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

Properties of the number 85

Number of digits2
Sum of digits13
Product of digits40
Number parityOdd
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Prime Factorization of 85

Prime factorization5 x 17
Prime factors5, 17
Number of distinct prime factors ω(n)2
Total number of prime factors Ω(n)2
Sum of prime factors22
Product of prime factors85
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Divisors of 85

List of proper divisors 1, 5, 17
List of all dividers1, 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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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.
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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 859.2195444572929
Natural Logarithm (ln) of 854.4426512564903
Decimal Logarithm (log) of 851.9294189257143
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 85-0.17607561994859
Cosecant of 85-5.6793779870944
Cosine of 85-0.98437664339404
Secant of 85-1.0158713198965
Tangent of 850.17887017243877
Cotangent of 855.590647039502
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Number parity

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

Is 85 an Even Number?


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 numerals৮৫
Eastern Arabic numerals٨٥
Hieroglyphs numeralsused in Ancient Egypt𓎍𓏾
Khmer numerals៨៥
Japanese numerals八十五
Roman numeralsLXXXV
Thai numerals๘๕
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How do you say 85 in 38 different languages?
Arabicخمسة و ثمانون
Croatianosamdeset i pet
Czechosmdesát pět
Danish fem og firs
Estonianblaenyi vɔ atɔ̃
Filipinowalóng pû’t limá
Greekογδόντα πέντε
Hebrewשמונים וחמש
Icelandicáttatíu og fimm
Indonesiandelapan puluh lima
Latvianastoņdesmit pieci
Lithuanianaštuoniasdešimt penki
Persianهشتاد و پنج
Polishosiemdziesiąt pięć
Portugueseoitenta e cinco
Romanianoptzeci şi cinci
Russianвосемьдесят пять
Serbianосамдесет и пет
Sloveneosemdeset pet
Spanish ochenta y cinco
Swahilithemanini na tano
Turkishseksen beş
Ukrainianвісімдесят пʼять
Vietnamesetám mươi lăm
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Number 85 reversed58
Unicode CharacterU+0055U
Unix TimestampThu, 01 Jan 1970 00:01:25 +0000
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