Properties of the Number 77981

Seventy-Seven Thousand Nine Hundred Eighty-One

Basics

Value: 77980 → 77981 → 77982

Parity: odd

Prime: No

Previous Prime: 77977

Next Prime: 77983

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 29 × 2689

Divisors: 1, 29, 2689, 77981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011000010011101

Octal: 230235

Duodecimal: 39165

Hexadecimal: 1309d

Square: 6081036361

Square Root: 279.25078334715556

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

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A299893

Structured tetrakis hexahedral numbers (vertex structure 5). A100174

Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A299889

Number of nX6 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A299891

Non-palindromic composite numbers such that n' = [Rev(n)]', where n' is the arithmetic derivative of n. A259077

Expansion of 1/(1+2·x-2·x²-2·x³). A77981