Properties of the Number 13691

Thirteen Thousand Six Hundred Ninety-One

Basics

Value: 13690 → 13691 → 13692

Parity: odd

Prime: Yes

Previous Prime: 13687

Next Prime: 13693

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 13691

Divisors: 1, 13691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010101111011

Octal: 32573

Duodecimal: 7B0B

Hexadecimal: 357b

Square: 187443481

Square Root: 117.00854669638453

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Primes of the form k² + 2. A56899

Primes which are the concatenation of two squares (in decimal notation). A167535

Number of bracelets (turnover necklaces) of n beads of 2 colors, 5 of them black. A32279

Primes p such that p is the largest member of a Wieferich tuple. A297846

T(n,k)=Number of nXk (-1,0,1) arrays of determinants of 2X2 subblocks of some (n+1)X(k+1) binary array. A226717

Numbers k such that (38^k + 1)/39 is prime. A229524

Primes p for which exactly five bases b with 1 < b < p exist such that p is a base b Wieferich prime. A255208

Primes that are palindromic in base 9. A29977

Primes p = prime(k) such that both p+2 and prime(k+6)-2 are prime numbers. A105413

a(n) = 10·n² + 1. A158187