Properties of the Number 77139

Seventy-Seven Thousand One Hundred Thirty-Nine

Basics

Value: 77138 → 77139 → 77140

Parity: odd

Prime: No

Previous Prime: 77137

Next Prime: 77141

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 2857

Divisors: 1, 3, 9, 27, 2857, 8571, 25713, 77139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10010110101010011

Octal: 226523

Duodecimal: 38783

Hexadecimal: 12d53

Square: 5950425321

Square Root: 277.73908619421934

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(1)=15; for n>1, a(n) = the smallest number k >a(n-1) such that 2·A174214(k)= 3*(k-1). A174216

Decimal expansion of ∑_k>=1 (H(k)/k)², where H(k) = ∑_j=1..k 1/j. A218505

a(1) = 1, a(n) = lcm(n, a(n-1)) / gcd(n, a(n-1)). A77139

Number of nX5 0..1 arrays with every element equal to 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. A298097