Properties of the Number 31969

Thirty-One Thousand Nine Hundred Sixty-Nine

Basics

Value: 31968 → 31969 → 31970

Parity: odd

Prime: No

Previous Prime: 31963

Next Prime: 31973

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 × 4567

Divisors: 1, 7, 4567, 31969

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111110011100001

Octal: 76341

Duodecimal: 16601

Hexadecimal: 7ce1

Square: 1022016961

Square Root: 178.79876957071042

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

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318045

Augmentation of the Catalan triangle, A009766. See Comments. A193560

Numbers k such that ∑_j=1..k (-j)^j == 1 (mod k). A343930

Number of (n+2) X 5 binary arrays with each 3 X 3 subblock having rows and columns in lexicographically nondecreasing order. A184542

Number of nX3 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318040

Numbers with exactly four distinct base-10 digits. A31969

Molien series for genus 2 complete weight enumerators of self-dual codes over GF(3). A92069