Properties of the Number 8321

Eight Thousand Three Hundred Twenty-One

Basics

Value: 8320 → 8321 → 8322

Parity: odd

Prime: No

Previous Prime: 8317

Next Prime: 8329

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 53 × 157

Divisors: 1, 53, 157, 8321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010000001

Octal: 20201

Duodecimal: 4995

Hexadecimal: 2081

Square: 69239041

Square Root: 91.21951545584969

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

Fermat pseudoprimes to base 2, also called Sarrus numbers or Poulet numbers. A1567

Strong pseudoprimes to base 2. A1262

Numbers that are the sum of 5 positive 6th powers. A3361

Euler pseudoprimes: composite numbers n such that 2^(n-1/2) == +-1 (mod n). A6970

Overpseudoprimes to base 2: composite k such that k = A137576((k-1)/2). A141232

a(n) = 2 * (4ⁿ + 2ⁿ) + 1. A85601

Euler-Jacobi pseudoprimes: 2^(n-1/2) == (2 / n) mod n, where (2 / n) is a Jacobi symbol. A47713

Super-Poulet numbers: Poulet numbers whose divisors d all satisfy d∣2^d-2. A50217

Pseudoprimes to base 7. A5938

Numbers whose arithmetic derivative (A003415) is a primorial number (A002110) > 1. A327978