Properties of the Number 56009

Fifty-Six Thousand Nine

Basics

Value: 56008 → 56009 → 56010

Parity: odd

Prime: Yes

Previous Prime: 56003

Next Prime: 56039

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 56009

Divisors: 1, 56009

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101101011001001

Octal: 155311

Duodecimal: 284B5

Hexadecimal: dac9

Square: 3137008081

Square Root: 236.66220653074288

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

Smaller of two consecutive prime numbers such that p1·p2·d - d = average of twin prime pairs, d (δ) = p2 - p1. A153378

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

Primes equal to a centered heptagonal number plus 1. A285811

Positions of hexagonal pyramidal numbers in the EKG sequence. A144080

Primes p such that p plus the cube of sum of digits of p is a perfect square. A259418

Primes of the form 7n³+9. A201257

Primes p such that ∑_k=primes<p (k mod p) and ∑_k=primes<p (p mod k) are both prime. A274025

Primes having only {0, 5, 6, 9} as digits. A386078

Primes p such that the sum and difference of the fourth power of the sum of 4 consecutive primes starting with p and the product of those primes are both prime. A389333

a(n) = (nⁿ + 1)/ (n^{2^a} + 1), where 2^a is the highest power of 2 dividing n. A56009