Properties of the Number 81939

Eighty-One Thousand Nine Hundred Thirty-Nine

Basics

Value: 81938 → 81939 → 81940

Parity: odd

Prime: No

Previous Prime: 81937

Next Prime: 81943

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 11 × 13 × 191

Divisors: 1, 3, 11, 13, 33, 39, 143, 191, 429, 573

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000000010011

Octal: 240023

Duodecimal: 3B503

Hexadecimal: 14013

Square: 6713999721

Square Root: 286.2498908296735

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 m + (sum of digits in base-4 representation of m) = n has exactly three solutions. A230635

a(1) = 2; a(n+1) is the smallest palindrome > a(n) that has a common factor with a(n). A81939