Properties of the Number 30809

Thirty Thousand Eight Hundred Nine

Basics

Value: 30808 → 30809 → 30810

Parity: odd

Prime: Yes

Previous Prime: 30803

Next Prime: 30817

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 30809

Divisors: 1, 30809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100001011001

Octal: 74131

Duodecimal: 159B5

Hexadecimal: 7859

Square: 949194481

Square Root: 175.524927004685

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

Total number of congruence subgroups of PSL(2,Z) of genus n. A258691

Primes of the form k² + k + 9. A27758

Primes p such that 8p +1 and (p-1)/8 are primes. A85958

Primes which remain prime after one and after two applications of the rotate-and-add operation of A086002. A86003

a(n) = Sum{a(k): k=0,1,2,...,n-4,n-2,n-1}; a(n-3) is not a summand; initial terms are 0,1,2. A49858

Row sums of triangle A131402. A131403

Integer k associated with the conjectured record-breaking maximal element A226667(n) of primitive Collatz-like 3x+k cycles. A226668

Number of linear connected animals formed from n 4-gon or 6-gon connected truncated octahedra. A363210

Prime numbers obtained by inserting a 0 between each pair of adjacent digits of a prime number > 10. A119680

Integer k associated with the conjectured record-breaking maximal value A226665(n) of the minimal elements of primitive Collatz-like 3x+k cycles. A226666