Properties of the Number 23985

Twenty-Three Thousand Nine Hundred Eighty-Five

Basics

Value: 23984 → 23985 → 23986

Parity: odd

Prime: No

Previous Prime: 23981

Next Prime: 23993

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 13 × 41

Divisors: 1, 3, 5, 9, 13, 15, 39, 41, 45, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101110110110001

Octal: 56661

Duodecimal: 11A69

Hexadecimal: 5db1

Square: 575280225

Square Root: 154.8709139896837

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 n such that n is a substring of its square in base 6 (written in base 10). A18830

a(n) is the least value of k such that the decimal expansion of n^k contains nine consecutive identical digits. A217164

Position of first repeat of the opening sequence of length n occurring after the first repeat of the opening sequence of length n-1 in the Kolakoski sequence (A000002). A74300

Potential magic constants of 9 X 9 magic squares composed of consecutive primes. A191679

a(n) = 2·p(n)*p(n+2) - p(n+1)² where p(k) = k-th prime. A324795

a(n) is the constant term in expansion of ∏_k=1..n (x^k² + 1 + 1/x^k²)². A369389

Sum of exponents in prime-power factorization of multinomial coefficient M(6n,2n,2n,2n). A23985

Revert transform of ((x - 1)(3x - 1))/(1 - 3x + x³). A49126