Properties of the Number 81641

Eighty-One Thousand Six Hundred Forty-One

Basics

Value: 81640 → 81641 → 81642

Parity: odd

Prime: No

Previous Prime: 81637

Next Prime: 81647

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 × 107 × 109

Divisors: 1, 7, 107, 109, 749, 763, 11663, 81641

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111011101001

Octal: 237351

Duodecimal: 3B2B5

Hexadecimal: 13ee9

Square: 6665252881

Square Root: 285.72889248376686

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

Row 7 of the array in A107735. A107731

a(n) = n-th prime of class 13- according to the Erdős-Selfridge classification. A81641