Properties of the Number 81966

Eighty-One Thousand Nine Hundred Sixty-Six

Basics

Value: 81965 → 81966 → 81967

Parity: even

Prime: No

Previous Prime: 81953

Next Prime: 81967

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 19 × 719

Divisors: 1, 2, 3, 6, 19, 38, 57, 114, 719, 1438

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10100000000101110

Octal: 240056

Duodecimal: 3B526

Hexadecimal: 1402e

Square: 6718425156

Square Root: 286.2970485352582

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 subsets of {1, 2, ..., n} containing n and having <=9 pairwise coprime elements. A186993

Row sums of A081964. A81966