Properties of the Number -2091

Ninety-One

Basics

Value: -2092 → -2091 → -2090

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 17 × 41

Divisors: 1, 3, 17, 41, 51, 123, 697, 2091

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100000101011

Octal: -4053

Duodecimal: -1263

Hexadecimal: -82b

Square: 4372281

Square Root: 45.727453460694704

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

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 389", based on the 5-celled von Neumann neighborhood. A271597

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 449", based on the 5-celled von Neumann neighborhood. A272255

Number of length n inversion sequences avoiding the patterns 110 and 120. A279570

Numbers k such that 7^k - 2 is a prime. A90669

Number of integer partitions of n that are constant or whose part multiplicities, except possibly the first and last, are all even. A349060

Antidiagonal sums of number triangle A086645. A108479

a(n) = n*(n+10). A98603

Expansion of 1/(1 - x - x² + x⁷ - x⁹). A225394

a(n) = n*(2·n+5)*(n-1)/6. A51925

a(n) = ∑_{k=0..floor(n/4)} binomial(n-2k,2k). A5252