Properties of the Number 69939

Sixty-Nine Thousand Nine Hundred Thirty-Nine

Basics

Value: 69938 → 69939 → 69940

Parity: odd

Prime: No

Previous Prime: 69931

Next Prime: 69941

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 409

Divisors: 1, 3, 9, 19, 57, 171, 409, 1227, 3681, 7771

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001000100110011

Octal: 210463

Duodecimal: 34583

Hexadecimal: 11133

Square: 4891463721

Square Root: 264.45982681685325

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

a(n) = a(n-1) + 2·a(floor(n/2)) if n > 0, otherwise 1. A58039

a(n) = n*(1 + n)*(3 - 4·n + 4·n²)/6. A213840

Number of irregular primes less than or equal to the 3ⁿ-th prime. A105467

Expansion of 1/(1 - ∑_{p prime, k>=1} x^{p^k}/(1 - x^{p^k})). A300672

Expansion of ∑_k>0 x^4·k/(1+x^k)⁵. A363618

Numbers whose set of base-16 digits is {1,3}. A32923

Numbers whose base-4 representation has exactly 9 runs. A43600

Numbers k such that number of runs in the base 4 representation of k is congruent to 0 mod 9. A43858

Numbers k such that number of runs in the base 4 representation of k is congruent to 9 mod 10. A43876

a(n) = ∑_d∣n μ(n/d) * binomial(d,4). A346761