Properties of the Number -138

One Hundred Thirty-Eight

Basics

Value: -139 → -138 → -137

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 23

Divisors: 1, 2, 3, 6, 23, 46, 69, 138

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001010

Octal: -212

Duodecimal: -B6

Hexadecimal: -8a

Square: 19044

Square Root: 11.74734012447073

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 > 0} 1/(1 + x^prime(k)). A48165

Partial alternating sums of the Dedekind ψ function (A001615): a(n) = ∑_k=1..n (-1)^k+1 * ψ(k). A357817

G.f. A(x) satisfies A(x) = (1 + x / A(x)^5/2) / (1 - x). A366405

Expansion of ψ(x) * φ(-x)³ / χ(-x³)³ in powers of·where φ(), ψ(), χ() are Ramanujan θ functions. A134077

Coefficients of the eighth-order mock θ function T₀(q). A153155

Expansion of ∏_k>=1 theta₄(x^k), where theta₄() is the Jacobi θ function. A320908

Partial alternating sums of the sum of unitary divisors function (A034448). A370898

Expansion of ∏_k>=1 (1 + x^k)^λ(k) where λ(k) is the Liouville function, A008836. A118207

Expansion of (∏_k>0 theta₄(q^k)/theta₃(q^k))^1/2, where theta₃() and theta₄() are the Jacobi θ functions. A320992

The y-coordinates of the vertices of the Babylonian Wurm. A342623