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9

Number 9 (nine) is an odd digit composite number and natural number following 8 and preceding 10.

Properties of the number 9

Nominal9
Cardinalnine
Ordinal9th
Number of digits1
Sum of digits9
Product of digits9
Number parityOdd
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Prime Factorization of 9

Prime factorization3 x 3
Prime factorization in exponent form32
Prime factors3
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)2
Sum of prime factors3
Product of prime factors3
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Divisors of 9

List of proper divisors 1, 3
List of all dividers1, 3, 9
Number of divisors d(n)3
Sum of all divisors σ(n)13
Aliquot sum 4
9 is a deficient number , since it is larger than the sum of its proper divisors (4). Its deficiency is 5.
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Prime numbers

Is 9 a prime number?No
Is 9 a semiprime number?Yes
Is 9 a Chen prime number?No
Is 9 a Mersenne prime number?No
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Sequences

Is 9 a Catalan number?No
Is 9 a Fibonacci number?No
Is 9 a Idoneal number?Yes: I8
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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.
9 is not a Happy number
9 is a Humble number
9 is not a Münchhausen number
9 is not a Perfect number
9 is a Perfect square
9 is a Palindrome
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Numeric Bases of 9

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
2Binary10012
3Ternary1003
4Quaternary214
5Quinary145
6Senary136
7Septenary127
8Octal118
9Nonary109
10Decimal9
12Duodecimal912
16Hexadecimal916
20Vigesimal920
36Base36936
60Sexagesimal960
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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 9 (n2)81
Cube of 9 (n3)729
Square root of 93
Natural Logarithm (ln) of 92.1972245773362
Decimal Logarithm (log) of 90.95424250943932
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 90.41211848524176
Cosecant of 92.426486643552
Cosine of 9-0.91113026188468
Secant of 9-1.097537906305
Tangent of 9-0.45231565944181
Cotangent of 9-2.2108454109992
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Number parity

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

Is 9 an Even Number?

No

Is 9 an Odd Number?

Yes, the number 9 is an odd number.
Total number of all odd numbers from 1 to 9 is 5
Sum of all the odd numbers from 1 to 9 are 25
The sum of all odd numbers is a perfect square: 25 = 5
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 9 in words is "nine", meaning that:
9 is an aban number (a number without the letter a)
9 is not an eban number (as it contains the letter e)
9 is not an iban number (as it contains the letter i)
9 is an oban number (a number without the letter o)
9 is a tban number (a number without the letter t)
9 is an uban number (a number without the letter u)
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Numeral systems

How to write 9 in other number systems?
Bengali numerals
Eastern Arabic numerals٩
Hieroglyphs numeralsused in Ancient Egypt𓐂
Khmer numerals
Japanese numerals
Roman numeralsIX
Thai numerals
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Translation

How do you say 9 in 38 different languages?
Arabicتسعة
Croatiandevet
Czechdevět
Danish ni
Dutchnegen
Estonianasieke
Faroeseníggju
Filipinosiyám
Finnishyhdeksän
Frenchneuf
Greekεννέα
Germanneun
Hebrewתשע
Hindiनौ
Hungariankilenc
Icelandicníu
Indonesiansembilan
Italiannove
Japanese
Korean
Latviandeviņi
Lithuaniandevyni
Norwegianni
Persianنه
Polishdziewięć
Portuguesenove
Romaniannouă
Russianдевять
Serbianдевет
Slovakdeväť
Slovenedevet
Spanish nueve
Swahilitisa
Swedishnio
Thaiเก้า
Turkishdokuz
Ukrainianдевʼять
Vietnamesechín
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Miscellaneous

Number 9 reversed9
ASCII Code9
Unicode CharacterU+0009
Unix TimestampThu, 01 Jan 1970 00:00:09 +0000
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