Properties of the Number 636

Six Hundred Thirty-Six

Basics

Value: 635 → 636 → 637

Parity: even

Prime: No

Previous Prime: 631

Next Prime: 641

Digit Sum: 15

Digital Root: 6

Palindrome: Yes

Factorization: 2 ² × 3 × 53

Divisors: 1, 2, 3, 4, 6, 12, 53, 106, 159, 212

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001111100

Octal: 1174

Duodecimal: 450

Hexadecimal: 27c

Square: 404496

Square Root: 25.219040425836983

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

Smith (or joke) numbers: composite numbers k such that sum of digits of k = sum of digits of prime factors of k (counted with multiplicity). A6753

a(n) = 2·a(n-1) + a(n-2) - a(n-3), with a(0) = a(1) = 0, a(2) = 1. A6054

Multiples of 12. A8594

Numbers whose prime indices cannot be partitioned into constant blocks with distinct sums. A381636

Hexanacci numbers with a(0) = ... = a(5) = 1. A383

Product of exactly four primes, three of which are distinct (p²*q·r). A85987

Numbers n such that the number of squarefree numbers between prime(n) and prime(n+1) = prime(n+1)-prime(n)-1. A68361

Multiples of 6 containing a 6 in their decimal representation. A121026

Numbers k such that both k and k + 1 are Niven numbers in base 2 (A049445). A330931

Numbers n divisible by their prime shadow A181819(n). A325755