Properties of the Number 56687

Fifty-Six Thousand Six Hundred Eighty-Seven

Basics

Value: 56686 → 56687 → 56688

Parity: odd

Prime: Yes

Previous Prime: 56681

Next Prime: 56701

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 56687

Divisors: 1, 56687

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101110101101111

Octal: 156557

Duodecimal: 2897B

Hexadecimal: dd6f

Square: 3213415969

Square Root: 238.09031899680423

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

Number of compositions of 2·n with n maximal runs. A336108

Primes p such that, if q is the next prime, p² + q is a prime times a power of 10. A352852

Number of compositions of n with exactly 10 transitions between different parts. A244722

The number of weakly alternating bargraphs of semiperimeter n. A bargraph is said to be weakly alternating if its ascents and descents alternate. An ascent (descent) is a maximal sequence of consecutive U (D) steps. A275448

Primes having only {5, 6, 7, 8} as digits. A386196

a(n) = [xⁿ] G(x)ⁿ, where G(x) = ∏_{k >= 1} 1/(1 - x^k)^k² is the g.f. of A023871. A380290

Numbers k such that 50·R_k + 9 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A56687