Properties of the Number 87981

Eighty-Seven Thousand Nine Hundred Eighty-One

Basics

Value: 87980 → 87981 → 87982

Parity: odd

Prime: No

Previous Prime: 87977

Next Prime: 87991

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 29327

Divisors: 1, 3, 29327, 87981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011110101101

Octal: 253655

Duodecimal: 42AB9

Hexadecimal: 157ad

Square: 7740656361

Square Root: 296.61591326157804

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 partitions of n into colored blocks of equal parts, such that all colors from a set of size nine are used and the colors are introduced in increasing order. A327292

Non-isomorphic colorings of the edges of a cube using at most n colors under rotational symmetries and permutations of the colors. A306194

E.g.f.: exp(-2·x) / (1-x)². A87981

Least m such that σ(n + φ(m)) = σ(φ(m)). A71116