Properties of the Number 69985

Sixty-Nine Thousand Nine Hundred Eighty-Five

Basics

Value: 69984 → 69985 → 69986

Parity: odd

Prime: No

Previous Prime: 69959

Next Prime: 69991

Digit Sum: 37

Digital Root: 1

Palindrome: No

Factorization: 5 × 13997

Divisors: 1, 5, 13997, 69985

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001000101100001

Octal: 210541

Duodecimal: 34601

Hexadecimal: 11161

Square: 4897900225

Square Root: 264.5467822522134

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

Pierpont semiprimes: semiprimes of the form (2^K)*(3^L)+1. A113432

Denominators of the continued fraction convergents of log₁₀((1+sqrt(5))/2). A217686

Rounded difference between 10ⁿ/(log(10ⁿ) - A) and π(10ⁿ), where A is Legendre's constant and π is the prime counting function. A58290

a(n) = 54·n² + 1. A158646

Numbers z such that x² + y⁷ = z² (with positive integers·and y) and gcd(x, y, z) = 1. A293693

Expansion of 1/(1-x³-x⁴-x⁵-x⁶). A17819

a(n) = 9·6ⁿ+1. A199413

Number of (n+2) X (1+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101. A261106

Sums s of positive exponents such that no prime of the form 2^j*3^k + 1 with j + k = s exists. A336772

Numerator of b(n) = binomial(2n,n)³*(42n+5)/2¹²ⁿ⁺⁴. A69985