Properties of the Number 56987

Fifty-Six Thousand Nine Hundred Eighty-Seven

Basics

Value: 56986 → 56987 → 56988

Parity: odd

Prime: No

Previous Prime: 56983

Next Prime: 56989

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 7 ² × 1163

Divisors: 1, 7, 49, 1163, 8141, 56987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111010011011

Octal: 157233

Duodecimal: 28B8B

Hexadecimal: de9b

Square: 3247518169

Square Root: 238.71950066971905

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

Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns ending at an odd level (0<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column. A121697

Number of (n+2) X 4 binary arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock. A190026

a(n) is the least positive integer in base n that when multiplied by 2n-1 will contain only the digits 0 and 1. A337624

Numbers k such that k and k+1 have the same sum of powerful divisors (A183097) and this sum is larger than 1. A349063

Discriminants of imaginary quadratic fields with class number 25 (negated). A56987