Properties of the Number 81913

Eighty-One Thousand Nine Hundred Thirteen

Basics

Value: 81912 → 81913 → 81914

Parity: odd

Prime: No

Previous Prime: 81901

Next Prime: 81919

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 13 × 6301

Divisors: 1, 13, 6301, 81913

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011111111111001

Octal: 237771

Duodecimal: 3B4A1

Hexadecimal: 13ff9

Square: 6709739569

Square Root: 286.2044723619811

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

Numbers that are both binary palindromes and binary Niven numbers. A334529

a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once. A143192

a(n) = 2ⁿ*(n³ - 3·n² + 2·n + 48)/48. A81913