Properties of the Number 18723

Eighteen Thousand Seven Hundred Twenty-Three

Basics

Value: 18722 → 18723 → 18724

Parity: odd

Prime: No

Previous Prime: 18719

Next Prime: 18731

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 79 ²

Divisors: 1, 3, 79, 237, 6241, 18723

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100100100011

Octal: 44443

Duodecimal: AA03

Hexadecimal: 4923

Square: 350550729

Square Root: 136.8320137979413

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

3p² where p runs through the primes. A79705

A three-dimensional version of the cellular automaton A160118, using cubes. A160119

Number of partitions of n into parts with an odd number of distinct prime divisors. A285799

First differences of A325056: distance in A076042 from n-th low point to the next. A324792

a(n) = (prime(n)² + prime(n+1))/2. A140511

3·h², where h is an odd integer not divisible by 3. A229852

The Hwang-Deutsch function f₃(n). A260996

Numbers that can be represented in more than one way as p²+p·q+q² with p and q primes, p<=q. A349987

Numbers of the form p²*q, with odd primes p > q, such that q divides p-1. A350638

Expansion of x*(1+3·x-4·x²-5·x³-4·x⁶+4·x⁵+3·x⁴) / ((1+4·x²)*(1+x²)*(1-x²+x⁴)). A112523