13

Previous number

12

Next number

14

Sum of digits

4

Divisors of 13

Number of divisors

2

Sum of divisors

14

Factorization

13 = 13

Prime factors of 13

Factor Count
13 1

Square of 13

169

Cube of 13

2197

Square root of 13

3.60555127546398912485869914235082...

Cube root of 13

2.35133468772075726604953160858713...

13th triangle number

91

Reciprocal of 13

0.0769230769230769

Binary of 13

1101

Number of digits of 13 in base 2

4

Octal of 13

15

Hexadecimal of 13

d

Prime number No
Hexagonal number No
Perfect number No
Deficient number No
Abundant number No
Mersenne number No
Harshad number No
Harmonic divisor number No

Quadratic residues of 13

QR13 (sequence)

13th composite number

22

Euler's totient function of 13

12

Carmichael function of 13

12

Möbius function of 13

-1

Properties of 13

Properties of the number 13: 13 has 2 divisors. The divisors of 13 are 1, 13 and the sum of them is 14. The factorization of 13 is 13. The square and cube of 13 are 169 and 2197 respectively. The square root and cube root of 13 are 3.60555127546398912485869914235082... and 2.35133468772075726604953160858713.... The binary, octal, hexadecimal of 13 are 1101, 15, d. 13 is not a prime number, not hexagonal number, not perfect number, not deficient number, not Mersenne number, not Mersenne number, not Harshad number, not harmonic divisor number.

sin 13

0.42016703682664091612508627804345...

cos 13

0.90744678145019619375233332903008...

tan 13

0.46302113293648961001025554651278...

sin 13°

0.22495105434386500342647252637107...

cos 13°

0.97437006478523524588553073044750...

tan 13°

0.23086819112556311583972501466633...

log 13

2.56494935746153673861158495128620...

log10 13

1.11394335230683672044449394888943...

log2 13

3.70043971814109218243515897484031...

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