Properties of the Number -783

Seven Hundred Eighty-Three

Basics

Value: -784 → -783 → -782

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 29

Divisors: 1, 3, 9, 27, 29, 87, 261, 783

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: -1100001111

Octal: -1417

Duodecimal: -553

Hexadecimal: -30f

Square: 613089

Square Root: 27.982137159266443

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 A064664, the inverse permutation of EKG-sequence. A323411

G.f. A(x) satisfies: 3ⁿ + 1 = ∑_k=0..n [x^k]A(x)ⁿ and also satisfies: (3+z)ⁿ + (1+z)ⁿ - zⁿ = ∑_k=0..n [x^k](A(x) + z·x)ⁿ for all z, where [x^k]A(x)ⁿ denotes the coefficient of x^k in A(x)ⁿ. A100239

Matrix inverse of triangle A111544. A111548

a(n) = (-1)ⁿ*n*(n-2). A131386

Expansion of (1-5·x-x²+x³)/((1+x)*(1-x)³). A141354

a(n) = 1 - n². A258837

Sequence obtained by taking the general formula for generalized k-gonal numbers: m*((k - 2)*m - k + 4)/2, where m = 0, +1, -1, +2, -2, +3, -3, ... and k >= 5. Here k = 0. A317300

Polynomial expansion sequence : p(x)=1 + x - x⁵ + x⁹ + x¹⁰. A143605

Years in which a transit of Venus (as seen from Earth) took place or is expected to occur, according to the catalog by Fred Espenak. A171467

Expansion of g.f. (2·x³ + 5) / ( -x⁵ + x³ + 1). A136598