Properties of the Number 99680

Ninety-Nine Thousand Six Hundred Eighty

Basics

Value: 99679 → 99680 → 99681

Parity: even

Prime: No

Previous Prime: 99679

Next Prime: 99689

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 2 ⁵ × 5 × 7 × 89

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000010101100000

Octal: 302540

Duodecimal: 49828

Hexadecimal: 18560

Square: 9936102400

Square Root: 315.7213961707379

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

Inverse binomial transform of A030186. A156096

Number of nX(n+2) arrays of permutations of n+2 copies of 0..n-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo n and the upper left element equal to 0. A267330

T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any southwest or northwest neighbors modulo n and the upper left element equal to 0. A267328

The number of solutions to φ(x) = φ(x+1) below 10ⁿ, where φ(x) is the Euler totient function. A300285

Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n edges. A99680