Properties of the Number -68

Sixty-Eight

Basics

Value: -69 → -68 → -67

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 17

Divisors: 1, 2, 4, 17, 34, 68

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000100

Octal: -104

Duodecimal: -58

Hexadecimal: -44

Square: 4624

Square Root: 8.246211251235321

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

Expansion of q^1/24 * η(q) / η(q²) in powers of q. A81362

Dirichlet inverse of σ function (A000203). A46692

Expansion of (1-x)/(1+x-x²+x³). A78042

a(n) = -2·n² + 12·n - 14. A147973

Coefficients of the 3rd-order mock θ function f(q). A25

Expansion of ∏_k>=1 (1 + x^4·k)/(1 + x^k). A261734

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 4. A49460

Expansion of χ(-q) / χ(-q¹⁰) in powers of q where χ() is a Ramanujan θ function. A145707

Coefficients of the '3rd-order' mock θ function ν(q). A53254

Irregular triangle read by rows: row n is the expansion of (1 + 2·x - x²)ⁿ. A123199