Properties of the Number -70

Seventy

Basics

Value: -71 → -70 → -69

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 7

Divisors: 1, 2, 5, 7, 10, 14, 35, 70

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000110

Octal: -106

Duodecimal: -5A

Hexadecimal: -46

Square: 4900

Square Root: 8.366600265340756

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

Dirichlet inverse of Euler totient function (A000010). A23900

a(n) = n * μ(n), where μ is the Möbius function A008683. A55615

Generalized sum of divisors function: excess of sum of odd divisors of n over sum of even divisors of n. A2129

Riordan array (1/(1-x), x/(1+x)). A112468

Triangle of coefficients of Legendre polynomials P_n (x). A8316

Triangle of coefficients of normalized Legendre polynomials, with increasing exponents. A100258

Expansion of Product (1 - x^k)⁸ in powers of x. A731

a(n) = μ(n)*φ(n) where μ(n) is the Mobius function (A008683) and φ(n) is the Euler totient function (A000010). A97945

Array read by antidiagonals downward where A(n,k) is the n-th term of the k-th differences of the squarefree numbers. A377038

a(n) = (-n⁵ + 15·n⁴ - 65·n³ + 125·n² - 34·n + 40)/40. A161713