Properties of the Number 509

Five Hundred Nine

Basics

Value: 508 → 509 → 510

Parity: odd

Prime: Yes

Previous Prime: 503

Next Prime: 521

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 509

Divisors: 1, 509

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 111111101

Octal: 775

Duodecimal: 365

Hexadecimal: 1fd

Square: 259081

Square Root: 22.561028345356956

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: Yes

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Pythagorean primes: primes of the form 4·k + 1. A2144

Sophie Germain primes p: 2p+1 is also prime. A5384

Prime-indexed primes: primes with prime subscripts. A6450

Primes with primitive root 2. A1122

Primes congruent to 1 or 2 modulo 4; or, primes of form x² + y²; or, -1 is a square mod p. A2313

Primes of the form 3n-1. A3627

Primes of the form 6k-1. A7528

Indices of prime Fibonacci numbers. A1605

Single (or isolated or non-twin) primes: Primes p such that neither p-2 nor p+2 is prime. A7510

Numbers k such that the sum of the squares of the first k primes is divisible by k. A111441