Properties of the Number 81679

Eighty-One Thousand Six Hundred Seventy-Nine

Basics

Value: 81678 → 81679 → 81680

Parity: odd

Prime: No

Previous Prime: 81677

Next Prime: 81689

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 13 × 61 × 103

Divisors: 1, 13, 61, 103, 793, 1339, 6283, 81679

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10011111100001111

Octal: 237417

Duodecimal: 3B327

Hexadecimal: 13f0f

Square: 6671459041

Square Root: 285.79538134826464

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

Number of (n+2)X(6+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 2 and no column sum 2. A255226

a(n) = (6ⁿ - 5ⁿ - 4ⁿ - 3ⁿ + 4·2ⁿ)/2. A81679