Properties of the Number 68391

Sixty-Eight Thousand Three Hundred Ninety-One

Basics

Value: 68390 → 68391 → 68392

Parity: odd

Prime: No

Previous Prime: 68389

Next Prime: 68399

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 17 × 149

Divisors: 1, 3, 9, 17, 27, 51, 149, 153, 447, 459

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000101100100111

Octal: 205447

Duodecimal: 336B3

Hexadecimal: 10b27

Square: 4677328881

Square Root: 261.5167298663701

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

Integers n of the form 8k+7 that are sum of distinct squares of the form m, m+1, m+2, m+4, where m == 1 (mod 4). A243578

Numbers n such that P(11·n) is prime where P(n) is the partition number. A113499

a(n) is the smallest positive integer which can be represented as the sum of n distinct nonzero tetrahedral numbers in exactly n ways, or -1 if no such integer exists. A360217

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 47 ones. A31815

Numbers n such that σ(n) = 3*φ(n). A68391