Properties of the Number 87980

Eighty-Seven Thousand Nine Hundred Eighty

Basics

Value: 87979 → 87980 → 87981

Parity: even

Prime: No

Previous Prime: 87977

Next Prime: 87991

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 53 × 83

Divisors: 1, 2, 4, 5, 10, 20, 53, 83, 106, 166

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011110101100

Octal: 253654

Duodecimal: 42AB8

Hexadecimal: 157ac

Square: 7740480400

Square Root: 296.61422757514515

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

Triangle T(n,k) read by rows giving number of fixed 4 X k polyominoes with n cells (n >= 4, 1<=k<=n-3). A59680

Expansion of 1/(1-x-x²-x⁶). A120400

Numbers k such that k and k² use only the digits 0, 4, 7, 8 and 9. A136959

Expansion of 1/(1 -x -x² -x⁶ -x²⁴ - ... -x^k! - ... ). A217283

Number of nX5 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A298960

Numbers with strictly decreasing prime exponents. A87980