Properties of the Number -1893

Eight Hundred Ninety-Three

Basics

Value: -1894 → -1893 → -1892

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 631

Divisors: 1, 3, 631, 1893

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11101100101

Octal: -3545

Duodecimal: -1119

Hexadecimal: -765

Square: 3583449

Square Root: 43.508619835614184

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 g.f.: 1 / (ζ(s) * ζ(s-1) * ζ(s-2)). A328254

Values of n such that L(19) and N(19) 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. A227522

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 113", based on the 5-celled von Neumann neighborhood. A270180

Numerators of coefficients in Taylor series expansion of (1+x+x²)^1/2. A290159

Central polygonal numbers: a(n) = n² - n + 1. A2061

Sum of divisors of square numbers. A65764

Number of sublattices of index n in generic 3-dimensional lattice. A1001

a(n) = 4·n² - 10·n + 7. A54554

a(n) = least m such that if a/b < c/d where a,b,c,d are integers in [0,n], then a/b < k/m < c/d for some integer k. A1000

Numbers k such that k, k+1 and k+2 are products of two primes. A56809