Properties of the Number 87979

Eighty-Seven Thousand Nine Hundred Seventy-Nine

Basics

Value: 87978 → 87979 → 87980

Parity: odd

Prime: No

Previous Prime: 87977

Next Prime: 87991

Digit Sum: 40

Digital Root: 4

Palindrome: No

Factorization: 97 × 907

Divisors: 1, 97, 907, 87979

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10101011110101011

Octal: 253653

Duodecimal: 42AB7

Hexadecimal: 157ab

Square: 7740304441

Square Root: 296.61254187913227

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 reversible string structures with n beads using a maximum of four different colors. A56323

Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 1. A242499

Array read by antidiagonals: T(n,k) is the number of color patterns (set partitions) in an unoriented row of length n using k or fewer colors (subsets). A320750

a(n) = Min {x : σ(x) = φ(n·x), x is not a prime}, least nonprime solutions to σ(x) = φ(n·x). A87979

Number of nX4 0..1 arrays with every element equal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300772