Properties of the Number 99780

Ninety-Nine Thousand Seven Hundred Eighty

Basics

Value: 99779 → 99780 → 99781

Parity: even

Prime: No

Previous Prime: 99767

Next Prime: 99787

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 × 1663

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 11000010111000100

Octal: 302704

Duodecimal: 498B0

Hexadecimal: 185c4

Square: 9956048400

Square Root: 315.8797239456816

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

E.g.f.: 1 - (1-x)^{1/(1 + log(1-x})). A203038

Numbers k such that k and k+1 have the same binary XOR of divisors. A227443

a(n) = ∑_{k=0..floor(n/3)} C(n-k, 2·k) * 2^k*3^n-3·k. A99780