Properties of the Number 61091

Sixty-One Thousand Ninety-One

Basics

Value: 61090 → 61091 → 61092

Parity: odd

Prime: Yes

Previous Prime: 61057

Next Prime: 61099

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 61091

Divisors: 1, 61091

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111010100011

Octal: 167243

Duodecimal: 2B42B

Hexadecimal: eea3

Square: 3732110281

Square Root: 247.16593616435094

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 3 consecutive prime numbers such that p1·p2·p3+d1+d2-1=average of twin prime pairs, d1(δ)=p2-p1,d2(δ)=p3-p2. A153402

Primes having Fibonacci prime gaps to both neighbor primes. A353135

Positive integers k such that k² = A²+B²+C² and A³+B³+C³ = m³, where gcd(A,B,C) = 1 and A, B, C, m are positive integers. A337251

a(n) = Fibonacci(n) - 1. A71

Ramanujan primes R_n: a(n) is the smallest number such that if x >= a(n), then π(x) - π(x/2) >= n, where π(x) is the number of primes <= x. A104272

Numerators of Cauchy numbers of first type. A6232

Hertzsprung's problem: ways to arrange n non-attacking kings on an n X n board, with 1 in each row and column. Also number of permutations of length n without rising or falling successions. A2464

Number of compositions of n that avoid the pattern 23-1. A189076

Bisection of A000930. A2478

a(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 2. A1610