Properties of the Number 56891

Fifty-Six Thousand Eight Hundred Ninety-One

Basics

Value: 56890 → 56891 → 56892

Parity: odd

Prime: Yes

Previous Prime: 56873

Next Prime: 56893

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 56891

Divisors: 1, 56891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111000111011

Octal: 157073

Duodecimal: 28B0B

Hexadecimal: de3b

Square: 3236585881

Square Root: 238.51834311012644

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

Numbers k such that k concatenated with k+5 gives the product of two numbers which differ by 5. A116193

Primes of the form k² + k + 9. A27758

Numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 7. A116152

Primes p such that 2·prime(p) + 1 = prime(q) for some prime q. A261361

Expansion of ∏_k>=1 (1 + x^k) * (1 + x^2·k) * (1 + x^3·k) * (1 + x^4·k). A327046

Ado [Simone Caramel]'s function: a(0) = 1, a(n) = a(n-1) + 2*(Fibonacci(n+1)-n), n > 0. A64551

Initial primes in prime triples (p, p+2, p+6) preceding the maximal gaps in A201598. A201599

Primes p such that p + 2, p + 6, and the concatenation p (p+2) (p+6) is prime. A174858

a(0)=2, a(1)=3, a(2)=5, a(n) = smallest prime greater than or equal to a(n-1) + a(n-2) + a(n-3). A155954

Number of Motzkin excursions of length n with an even number of peaks. A307576