Properties of the Number 68931

Sixty-Eight Thousand Nine Hundred Thirty-One

Basics

Value: 68930 → 68931 → 68932

Parity: odd

Prime: No

Previous Prime: 68927

Next Prime: 68947

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 23 × 37

Divisors: 1, 3, 9, 23, 27, 37, 69, 81, 111, 207

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110101000011

Octal: 206503

Duodecimal: 33A83

Hexadecimal: 10d43

Square: 4751482761

Square Root: 262.5471386246668

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

G.f.: ∏_k>=1 1/(1-x^k)^2·k-1. A253289

a(n) = (1+n)*(9 + 11·n + 4·n²)/3. A172482

Number of regions in an equilateral triangle "frame" of size n. A328526

Numerators of the continued fraction convergents of the decimal concatenation of the prime-indexed primes. A128850

a(n) = 8ⁿ - 2ⁿ. A248217

Number of incongruent ways to tile a 6 X n room with 1x2 Tatami mats. At most 3 Tatami mats may meet at a point. A68931