Properties of the Number 80787

Eighty Thousand Seven Hundred Eighty-Seven

Basics

Value: 80786 → 80787 → 80788

Parity: odd

Prime: No

Previous Prime: 80783

Next Prime: 80789

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 3847

Divisors: 1, 3, 7, 21, 3847, 11541, 26929, 80787

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011101110010011

Octal: 235623

Duodecimal: 3A903

Hexadecimal: 13b93

Square: 6526539369

Square Root: 284.2305402309893

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

Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+4, n]]. The number of n-orbit permutations of a (2n+4)-set with at least 2 elements in each orbit. Also known as associated Stirling numbers of the first kind (e.g., Comtet). A1785

a(1)=a(2)=1; a(n) = a(n-1) + last decimal digit of a(n-2). A80787