Properties of the Number 77140

Seventy-Seven Thousand One Hundred Forty

Basics

Value: 77139 → 77140 → 77141

Parity: even

Prime: No

Previous Prime: 77137

Next Prime: 77141

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 5 × 7 × 19 × 29

Divisors: 1, 2, 4, 5, 7, 10, 14, 19, 20, 28

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10010110101010100

Octal: 226524

Duodecimal: 38784

Hexadecimal: 12d54

Square: 5950579600

Square Root: 277.7408864391413

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

For a rational number p/q let f(p/q) = p·q divided by (the sum of digits of p and of q) minus 1; a(n) is obtained by iterating f, starting at n/1, until an integer is reached, or if no integer is ever reached then a(n) = 0. A59514

a(n) = n*(n+1)*(7·n-6)/2. A256718

Numbers k such that 1+k, 1+k², 1+k⁴ and 1+k¹⁶ are all prime. A188698

Decimal expansion of 17 + 12·sqrt(2). A156164

Smallest i such that there exists j such that i = x + y + z, j = x·y*z has exactly n solutions in positive integers x <= y <= z. A103277

a(1) = 1 and then add n to the previous term if n is coprime to the previous term, otherwise subtract n from the previous term. a(1) = 1 and a(n) = a(n-1) + n if gcd(n, a(n-1)) = 1, otherwise a(n) = a(n-1) - n. A77140