Properties of the Number 68991

Sixty-Eight Thousand Nine Hundred Ninety-One

Basics

Value: 68990 → 68991 → 68992

Parity: odd

Prime: No

Previous Prime: 68963

Next Prime: 68993

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 13 × 29 × 61

Divisors: 1, 3, 13, 29, 39, 61, 87, 183, 377, 793

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000110101111111

Octal: 206577

Duodecimal: 33B13

Hexadecimal: 10d7f

Square: 4759758081

Square Root: 262.6613789653896

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 k such that σ(k-φ(k)) = φ(k). A70170

McKay-Thompson series of class 28A for Monster. A58606

Numbers k such that ∑_{d divides k} σ(d)/φ(d) is an integer. A68991