Properties of the Number 17689

Seventeen Thousand Six Hundred Eighty-Nine

Basics

Value: 17688 → 17689 → 17690

Parity: odd

Prime: No

Previous Prime: 17683

Next Prime: 17707

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 7 ² × 19 ²

Divisors: 1, 7, 19, 49, 133, 361, 931, 2527, 17689

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100010100011001

Octal: 42431

Duodecimal: A2A1

Hexadecimal: 4519

Square: 312900721

Square Root: 133

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

Squares of the squarefree semiprimes (p²*q²). A85986

a(n) = (3·n+1)². A16778

a(n) = (6·n + 1)². A16922

a(n) = (4·n + 1)². A16814

Number of 3·n binary matrices without unit columns up to row and column permutations. A57524

Matula-Goebel numbers of series-reduced powerful rooted trees. A317705

a(n) = Fibonacci(n) - n. A65220

Least square n-gonal number greater than 1, or 0 if none exists. A100252

Perfect squares which are not the sum of two primes. A106562

Perfect squares which are neither the sum nor the difference of two primes. A106573