Properties of the Number -2783

Seven Hundred Eighty-Three

Basics

Value: -2784 → -2783 → -2782

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 ² × 23

Divisors: 1, 11, 23, 121, 253, 2783

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101011011111

Octal: -5337

Duodecimal: -173B

Hexadecimal: -adf

Square: 7745089

Square Root: 52.754146756439916

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

a(1) = 1; a(n) = -∑_k=2..n k² * a(floor(n/k)). A360390

Expansion of f(-x) * f(-x²)⁴ / φ(x²) in powers of·where φ(), f() are Ramanujan θ functions. A275372

Values of n such that L(16) and N(16) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227519

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 369", based on the 5-celled von Neumann neighborhood. A270793

G.f. A(x) satisfies: A(x)² equals the g.f. of A110630, which consists entirely of numbers 1 through 4. A112570

Write 1,2,... in a clockwise spiral; sequence gives numbers on positive·axis. A33951

Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1. A6145

D-toothpick sequence of the third kind starting with a single toothpick. A220500

Number of distinct possible alternating products of integer partitions of n. A347461

Triangle read by rows: T(n,k) = number of permutations of [n] allowing i->i+j (mod n), j=0..k-1. A8305