Properties of the Number 87705

Eighty-Seven Thousand Seven Hundred Five

Basics

Value: 87704 → 87705 → 87706

Parity: odd

Prime: No

Previous Prime: 87701

Next Prime: 87719

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 1949

Divisors: 1, 3, 5, 9, 15, 45, 1949, 5847, 9745, 17541

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10101011010011001

Octal: 253231

Duodecimal: 42909

Hexadecimal: 15699

Square: 7692167025

Square Root: 296.150299679065

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

Number of nX3 0..1 arrays with every element equal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300430

a(0) = 0; a(n+1) = 2·a(n) + k where k = 0 if prime(n+2)/prime(n+1) < prime(n+1)/prime(n), otherwise k = 1. A215410

First integer > n reached under iteration of map x -> (5/3)*floor(x) when started at n, or -1 if no such integer is ever reached. A87705