Properties of the Number 31904

Thirty-One Thousand Nine Hundred Four

Basics

Value: 31903 → 31904 → 31905

Parity: even

Prime: No

Previous Prime: 31891

Next Prime: 31907

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ⁵ × 997

Divisors: 1, 2, 4, 8, 16, 32, 997, 1994, 3988, 7976

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111110010100000

Octal: 76240

Duodecimal: 16568

Hexadecimal: 7ca0

Square: 1017865216

Square Root: 178.61690849412886

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

Square array T(n,k), n >= 2, k >= 2, read by antidiagonals, where T(n,k) is the number of (undirected) Hamiltonian cycles on the n X k king graph. A339190

Number of (undirected) Hamiltonian cycles on the n X 3 king graph. A339200

a(n) = ∑_{k=0..floor(n/2)} 2^k * binomial(k,n-2·k)². A387476

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 89. A31587

a(n) = prime(9·n - 4). A31904