Properties of the Number 81748

Eighty-One Thousand Seven Hundred Forty-Eight

Basics

Value: 81747 → 81748 → 81749

Parity: even

Prime: No

Previous Prime: 81737

Next Prime: 81749

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 107 × 191

Divisors: 1, 2, 4, 107, 191, 214, 382, 428, 764, 20437

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011111101010100

Octal: 237524

Duodecimal: 3B384

Hexadecimal: 13f54

Square: 6682735504

Square Root: 285.9160716014404

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) = ψ(k) + τ(k)⁴. A389546

a(n) = a(n-1) + 2·a(n-2) + 8·Fibonacci(n) + 2·Fibonacci(n-1); a(1) = 4, a(2) = 14. A291675

a(n) = (A081746(n) - n)/4. A81748