Properties of the Number -9291

Two Hundred Ninety-One

Basics

Value: -9292 → -9291 → -9290

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 19 × 163

Divisors: 1, 3, 19, 57, 163, 489, 3097, 9291

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -10010001001011

Octal: -22113

Duodecimal: -5463

Hexadecimal: -244b

Square: 86322681

Square Root: 96.38983348880731

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

Number of regions in an equilateral triangular figure formed by the straight line segments connecting all vertices and all points that divide the sides into n equal parts. A92867

Numbers n whose square can be represented as a repdigit number in some base less than n. A158235

a(n) is the number of tuples (t₁, ..., t_k) with a positive integer k and integers 2 <= t₁ <= ... <= t_k such that n = ∏_{i = 1..k} (3 + 1/t_i). A355627

a(n) is the number of tuples (t₁, ..., t_n) with integers 2 <= t₁ <= ... <= t_n such that 3ⁿ + 1 = ∏_{i = 1..n} (3 + 1/t_i). A355629

Number of connected achiral planar maps with an external face and n internal triangular faces. A378341

a(n) = ∑_i=1..n φ(i)*φ(i+1), where φ(n) = A000010(n) is Euler's totient function. A330319

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of regions in the resulting planar graph. A367323

First row of spectral array W(e-1). A22161

Leading diagonal of A083173. A83174

Secondary diagonal of A139755, the table of q-derangement numbers of type A. A141754