Properties of the Number 969

Nine Hundred Sixty-Nine

Basics

Value: 968 → 969 → 970

Parity: odd

Prime: No

Previous Prime: 967

Next Prime: 971

Digit Sum: 24

Digital Root: 6

Palindrome: Yes

Factorization: 3 × 17 × 19

Divisors: 1, 3, 17, 19, 51, 57, 323, 969

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: Yes

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111001001

Octal: 1711

Duodecimal: 689

Hexadecimal: 3c9

Square: 938961

Square Root: 31.12876483254676

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

Tetrahedral (or triangular pyramidal) numbers: a(n) = C(n+2,3) = n*(n+1)*(n+2)/6. A292

Numbers k such that (7·10^k + 71)/3 is prime. A270831

Number of dissections of a polygon: binomial(4·n, n)/(3·n + 1). A2293

a(n) = 2·n² + 1. A58331

9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7·n-5)/2. A1106

a(n) = 1² + 3² + 5² + 7² + ... + (2·n-1)² = n*(4·n² - 1)/3. A447

Generalized 9-gonal (or enneagonal) numbers: m*(7·m - 5)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A118277

Number of partitions of n such that the successive differences of consecutive parts are nondecreasing. A240026

Expansion of (1+x)/(1-x²)⁴: duplicated tetrahedral numbers. A58187

Products of exactly three distinct odd primes. A46389