Properties of the Number 27809

Twenty-Seven Thousand Eight Hundred Nine

Basics

Value: 27808 → 27809 → 27810

Parity: odd

Prime: Yes

Previous Prime: 27803

Next Prime: 27817

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 27809

Divisors: 1, 27809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110010100001

Octal: 66241

Duodecimal: 14115

Hexadecimal: 6ca1

Square: 773340481

Square Root: 166.76030702778164

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 that are palindromic in base 11. A29978

Numbers n such that n¹+n+1, n²+n+1, n³+n+1 and n⁴+n+1 are all prime. A219117

Primes p with π(p) and π(p²) both prime, where π(.) is given by A000720. A237659

Primes p such that q = p² - 2, r = q² - 2 and s = r² - 2 are also prime. A257552

Numerators of the partial sums of the reciprocals of the 3rd Piltz function d₃(n) (A007425). A379357

Prime numbers p such that 2·p+1, p*(p + 1) - 1 and p*(p + 1) + 1 are also primes. A136015

Primes p such that p¹+p+1, p²+p+1, p³+p+1, and p⁴+p+1 are all prime. A236045

Primes p such that p⁴ + p +/- 1 are twin primes. A236951

Number of Grassmannian permutations of size n that avoid a pattern, σ, where σ is a pattern of size 10 with exactly one descent. A362197

Sophie Germain primes in A154939. A154941