Properties of the Number 7969

Seven Thousand Nine Hundred Sixty-Nine

Basics

Value: 7968 → 7969 → 7970

Parity: odd

Prime: No

Previous Prime: 7963

Next Prime: 7993

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 13 × 613

Divisors: 1, 13, 613, 7969

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111100100001

Octal: 17441

Duodecimal: 4741

Hexadecimal: 1f21

Square: 63504961

Square Root: 89.26925562588724

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

Numbers k for which 10k+1, 10k+3, 10k+7 and 10k+9 are primes. A7811

Least k such that ∑_i=1..k (prime(i) + prime(i+2) - 2·prime(i+1)) = 2n + 1. A73051

Number of representations of n as a sum of products of pairs of positive integers, considered to be equivalent when terms or factors are reordered. A182269

Numbers k such that the k-th maximal run of composite numbers has length different from all prior maximal runs. Sorted positions of first appearances in A176246 (or A046933 shifted). A373400

T(n,k)=Number of length n+2 0..k arrays with the sum of second differences squared multiplied by some arrangement of +-1 equal to zero. A250320

Wiener index of a benzenoid consisting of a spiral chain of n hexagons (s=1; see the Gutman et al. reference). A193391

Expansion of (1+2·x+3·x²)/((1-x)³*(1-x²)). A55232

Numbers n such that the decimal number concat(9,n) is a square. A273364

Maximum detour index of any bipartite graph on n nodes. A296819

Numbers which need eleven 'Reverse and Add' steps to reach a palindrome. A65216