Properties of the Number -493

Four Hundred Ninety-Three

Basics

Value: -494 → -493 → -492

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 17 × 29

Divisors: 1, 17, 29, 493

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111101101

Octal: -755

Duodecimal: -351

Hexadecimal: -1ed

Square: 243049

Square Root: 22.20360331117452

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 ∏_k>=1 (1 + x^6·k)/(1 + x^k). A261736

Triangle of coefficients of Gaussian polynomials [2n+7,6]_q represented as finite sum of terms (1+q²)^k*q^g-k, where k = 0,1,...,g with g=6n+3. A267486

G.f. equals the logarithm of the e.g.f. of A296174. A296175

Expansion of -x/((x²+x+1)*(x²+3·x+1)); invert transform gives signed version of tetrahedral numbers A000292. A113067

The Euclid tree with root 1 encoded by semiprimes, read across levels. A295512

Triangle of Salie numbers T(n,k) for negative n,k, n < k. A98435

Expansion of (1-3x)/(1-x²+x³). A117374

Large-q series expansion for the exponential of the surface free energy of the square-lattice zero-temperature Potts antiferromagnet, in terms of the variable z = 1/(q - 1). A238835

a(n) = [xⁿ] ∏_d∣n 1/(1 + x^d). A300548

a(n) = ∑_{k=0..floor(n/8)} (-1)^k * binomial(n-4·k,4·k). A348309