Properties of the Number -1691

Six Hundred Ninety-One

Basics

Value: -1692 → -1691 → -1690

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 19 × 89

Divisors: 1, 19, 89, 1691

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11010011011

Octal: -3233

Duodecimal: -B8B

Hexadecimal: -69b

Square: 2859481

Square Root: 41.12177038990418

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 (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 5. A60024

G.f.: ∑_n=-oo..+oo x^n² / (1 - xⁿ)ⁿ. A261605

Sequence of coefficients arising in study of generating function for A067619. A186545

tanh(arctan(arcsin(x)))=x-3/3!*x³+49/5!*x⁵-1691/7!*x⁷+108961/9!*x⁹... A12199

The sequence of coefficients of cubic polynomials p(x-n), where p(x) = x³ - 3·x + 1. A218332

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood. A272513

Number of rucksack partitions of n: every consecutive constant subsequence has a different sum. A353864

Generalized 11-gonal (or hendecagonal) numbers: m*(9·m - 7)/2 with m = 0, 1, -1, 2, -2, 3, -3, ... A195160

Number of integer partitions of n whose distinct parts are pairwise indivisible. A305148

Number of integer partitions of n whose first differences (assuming the last part is zero) are unimodal. A332283