Properties of the Number 80191

Eighty Thousand One Hundred Ninety-One

Basics

Value: 80190 → 80191 → 80192

Parity: odd

Prime: Yes

Previous Prime: 80177

Next Prime: 80207

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 80191

Divisors: 1, 80191

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011100100111111

Octal: 234477

Duodecimal: 3A4A7

Hexadecimal: 1393f

Square: 6430596481

Square Root: 283.18015467189787

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

Primes p such that p-1 and p+1 are divisible by a fifth power. A89212

The number of vertices on a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts. A332418

Leading diagonal of triangle in A072467. A72468

Primes which are divisors of numbers of the form (2^φ(3^k) - 1)/3^k. A152008

Numbers k such that 2^{3^j} == 1 (mod k) for some j. A318688

Primes p such that there is at least one Pythagorean triple with perimeter s and inradius r such that s + r² = p². A393205

Primes p such that p is the largest of all prime factors of the numbers between the prime preceding 2·p and the next prime. A80191

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 vertices in the resulting planar graph. A367322