Properties of the Number 99581

Ninety-Nine Thousand Five Hundred Eighty-One

Basics

Value: 99580 → 99581 → 99582

Parity: odd

Prime: Yes

Previous Prime: 99577

Next Prime: 99607

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 99581

Divisors: 1, 99581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 11000010011111101

Octal: 302375

Duodecimal: 49765

Hexadecimal: 184fd

Square: 9916375561

Square Root: 315.5645734235705

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 k such that 66^k - 65^k is prime. A62632

Primes of the form f(n) = 9·n⁴ - 444·n³ + 8059·n² - 63714·n + 185371 listed by increasing value of n >= 0. A117225

Number of partitions of n into 4 squares. A2635

a(1) = 2; a(n+1) is the least prime p not already used such that p-a(n) is not equal to a(k+1)-a(k) for any k < n. A101595

a(n) = ∑_{k=0..floor(n/2)} binomial(n-k,k-1)*3^n-k-1. A99581

Number of partitions of n into not more than 5 pentagonal numbers. A2637