Properties of the Number 31997

Thirty-One Thousand Nine Hundred Ninety-Seven

Basics

Value: 31996 → 31997 → 31998

Parity: odd

Prime: No

Previous Prime: 31991

Next Prime: 32003

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 653

Divisors: 1, 7, 49, 653, 4571, 31997

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110011111101

Octal: 76375

Duodecimal: 16625

Hexadecimal: 7cfd

Square: 1023808009

Square Root: 178.87705274852894

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(0)=4, a(1)=0, a(2)=0, a(3)=3; thereafter a(n) = a(n-3) + a(n-4). A50443

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 161", based on the 5-celled von Neumann neighborhood. A286165

Start with a(1)=1; now a(n+1)=a(n)+a(k) with k=[n-n-th digit of π]. If k<0 or k=0, then a(k)=0. A133389

Number of nonnegative integer arrays of length 2n+5 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value n+1. A211850

Odd numbers which when cubed give number composed just of the digits 0, 1, 2, 3. A31997