Properties of the Number 99980

Ninety-Nine Thousand Nine Hundred Eighty

Basics

Value: 99979 → 99980 → 99981

Parity: even

Prime: No

Previous Prime: 99971

Next Prime: 99989

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 5 × 4999

Divisors: 1, 2, 4, 5, 10, 20, 4999, 9998, 19996, 24995

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011010001100

Octal: 303214

Duodecimal: 49A38

Hexadecimal: 1868c

Square: 9996000400

Square Root: 316.19614165893927

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

Numbers n such that every digit of both n and n² contains a loop (only digits 0,4,6,8,9 in n and n²). A107626

a(n) = n⁵ - 2n. A242436

Composite numbers k such that (k+1)*σ(k) is a perfect square. A73586

Numbers k such that k and k² use only the digits 0, 4, 6, 8 and 9. A136956

Lengths of loops in the P2 Penrose tiling. A215878

Smallest number requiring n steps to reach a palindrome under the "add a digit" process described in A241173. A241174

Bisection of A001358. A99980