Properties of the Number -891

Eight Hundred Ninety-One

Basics

Value: -892 → -891 → -890

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 11

Divisors: 1, 3, 9, 11, 27, 33, 81, 99, 297, 891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1101111011

Octal: -1573

Duodecimal: -623

Hexadecimal: -37b

Square: 793881

Square Root: 29.8496231131986

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 η(q)⁵ * η(q³) * η(q⁶)⁴ / η(q²)⁴ in powers of q. A214262

a(n) = - 6·a(n-1) - 9·a(n-2) - 3·a(n-3) with a(0)=3, a(1)=-6, a(2)=18. A215634

a(n) = ∑_k=0..n A105595(k)*(-1)^k*A105595(n-k) (interpolated zeros suppressed). A105596

Composition of Catalan and Fibonacci numbers. A189675

a(n) = p(n) - p(n-1) - p(n-2) + p(n-5), where p(n) = A000041(n). A195054

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 205", based on the 5-celled von Neumann neighborhood. A270732

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 209", based on the 5-celled von Neumann neighborhood. A270894

Expansion of (1-x)/(1+2·x+x²-2·x³). A78063

Riordan array ((1-x)/(1-3·x+3·x²), x/(1-3·x+3·x²)). A236311

Numbers having k prime factors (counted with multiplicity), the largest of which is the k-th prime. A106529