Properties of the Number 81668

Eighty-One Thousand Six Hundred Sixty-Eight

Basics

Value: 81667 → 81668 → 81669

Parity: even

Prime: No

Previous Prime: 81667

Next Prime: 81671

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 17 × 1201

Divisors: 1, 2, 4, 17, 34, 68, 1201, 2402, 4804, 20417

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111100000100

Octal: 237404

Duodecimal: 3B318

Hexadecimal: 13f04

Square: 6669662224

Square Root: 285.77613616255644

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 n such that the difference between the greatest prime divisor of n² + 1 and the sum of the other distinct prime divisors is equal to +-1. A244194

Expansion of 2·sinh(x) + BesselI₀(2·x). A81668