Properties of the Number 87831

Eighty-Seven Thousand Eight Hundred Thirty-One

Basics

Value: 87830 → 87831 → 87832

Parity: odd

Prime: No

Previous Prime: 87811

Next Prime: 87833

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 3253

Divisors: 1, 3, 9, 27, 3253, 9759, 29277, 87831

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011100010111

Octal: 253427

Duodecimal: 429B3

Hexadecimal: 15717

Square: 7714284561

Square Root: 296.36295315035585

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

Table read by antidiagonals: Place k points in general position on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives number of vertices in the resulting planar graph. A367183

a(n) = a(abs(n-a(n-1))) + a(a(abs(n-a(n-4)))) if n>4, a(n) = 1 otherwise. A87831

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