Properties of the Number 99665

Ninety-Nine Thousand Six Hundred Sixty-Five

Basics

Value: 99664 → 99665 → 99666

Parity: odd

Prime: No

Previous Prime: 99661

Next Prime: 99667

Digit Sum: 35

Digital Root: 8

Palindrome: No

Factorization: 5 × 31 × 643

Divisors: 1, 5, 31, 155, 643, 3215, 19933, 99665

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000010101010001

Octal: 302521

Duodecimal: 49815

Hexadecimal: 18551

Square: 9933112225

Square Root: 315.69764015589345

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

a(n) = floor(c·s*a(n-1)) + floor(d·r*a(n-2)), where r = (3 + sqrt(13))/2, s = r/(r-1), c = 3, d = 1, a(0) = 1, a(1) = 1. A275860

Number of vertices of the Gelfand Tsetlin-polytope. Alternatively, the number of Gelfand-Tsetlin patterns with top row 1234...n and such that every entry in a given row also appears in the row above it. A130715

Number of total dominating sets in the n-dipyramidal graph. A347481

Number of nX5 0..1 arrays avoiding 0 0 0 horizontally and 0 1 0 vertically. A207179

a(n) is the largest prime before A002279(n). A99665