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13

Number 13 (thirteen) is an odd two-digits prime number and natural number following 12 and preceding 14.

Properties of the number 13

Nominal13
Cardinalthirteen
Ordinal13th
Number of digits2
Sum of digits4
Product of digits3
Number parityOdd
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Prime Factorization of 13

Prime factorization13
Prime factors13
Number of distinct prime factors ω(n)1
Total number of prime factors Ω(n)1
Sum of prime factors13
Product of prime factors13
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Divisors of 13

List of proper divisors 1
List of all dividers1, 13
Number of divisors d(n)2
Sum of all divisors σ(n)14
Aliquot sum 1
13 is a deficient number , since it is larger than the sum of its proper divisors (1). Its deficiency is 12.
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Prime numbers

Is 13 a prime number?Yes
Is 13 a semiprime number?No
Is 13 a Chen prime number?Yes
Is 13 a Mersenne prime number?Yes: M4
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Sequences

Is 13 a Catalan number?No
Is 13 a Fibonacci number?Yes
Is 13 a Idoneal number?Yes: I11
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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.
13 is a Happy number
13 is not a Humble number
13 is not a Münchhausen number
13 is not a Perfect number
13 is not a Perfect square
13 is not a Palindrome
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Numeric Bases of 13

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
2Binary11012
3Ternary1113
4Quaternary314
5Quinary235
6Senary216
7Septenary167
8Octal158
9Nonary149
10Decimal13
12Duodecimal1112
16Hexadecimald16
20Vigesimald20
36Base36d36
60SexagesimalD60
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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 13 (n2)169
Cube of 13 (n3)2197
Square root of 133.605551275464
Natural Logarithm (ln) of 132.5649493574615
Decimal Logarithm (log) of 131.1139433523068
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 130.42016703682664
Cosecant of 132.3800058366135
Cosine of 130.9074467814502
Secant of 131.1019929988642
Tangent of 130.46302113293649
Cotangent of 132.1597286362676
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Number parity

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

Is 13 an Even Number?

No

Is 13 an Odd Number?

Yes, the number 13 is an odd number.
Total number of all odd numbers from 1 to 13 is 7
Sum of all the odd numbers from 1 to 13 are 49
The sum of all odd numbers is a perfect square: 49 = 7
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 13 in words is "thirteen", meaning that:
13 is an aban number (a number without the letter a)
13 is not an eban number (as it contains the letter e)
13 is not an iban number (as it contains the letter i)
13 is an oban number (a number without the letter o)
13 is not a tban number (as it contains the letter t)
13 is an uban number (a number without the letter u)
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Numeral systems

How to write 13 in other number systems?
Bengali numerals১৩
Eastern Arabic numerals١٣
Hieroglyphs numeralsused in Ancient Egypt𓎆𓏼
Khmer numerals១៣
Japanese numerals十三
Roman numeralsXIII
Thai numerals๑๓
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Translation

How do you say 13 in 38 different languages?
Arabicثلاثة عشر
Croatiantrinaest
Czechtřináct
Danish tretten
Dutchdertien
Estonianwuietɔ̃
Faroesetrettan
Filipinolabíng-tatló
Finnishkolmetoista
Frenchtreize
Greekδεκα­τρία
Germandreizehn
Hebrewשלוש עשרה
Hindiतेरह
Hungariantizen­három
Icelandicþrettán
Indonesiantiga belas
Italiantredici
Japanese十三
Korean십삼
Latviantrīspadsmit
Lithuaniantrylika
Norwegiantretten
Persianسیزده
Polishtrzynaście
Portuguesetreze
Romaniantreisprezece
Russianтринадцать
Serbianтринаест
Slovaktrinásť
Slovenetrinajst
Spanish trece
Swahilikumi na tatu
Swedishtretton
Thaiสิบ​สาม
Turkishon üç
Ukrainianтринадцять
Vietnamesemười ba
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Miscellaneous

Number 13 reversed31
ASCII Code13
Unicode CharacterU+000D
Unix TimestampThu, 01 Jan 1970 00:00:13 +0000
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