Properties of the Number 61403

Sixty-One Thousand Four Hundred Three

Basics

Value: 61402 → 61403 → 61404

Parity: odd

Prime: Yes

Previous Prime: 61381

Next Prime: 61409

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 61403

Divisors: 1, 61403

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111111011011

Octal: 167733

Duodecimal: 2B64B

Hexadecimal: efdb

Square: 3770328409

Square Root: 247.7962873006777

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

Least prime divisor of the n-th central Delannoy number D(n) which does not divide any D(k) with k < n, or 1 if such a primitive prime divisor of D(n) does not exist. A242173

Numbers k such that (20^k - 1)/19 is prime. A127995

Least prime p such that 3 + 4·prime(p·n) = 5·prime(q·n) for some prime q. A260886

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 910", based on the 5-celled von Neumann neighborhood. A284402

a(1) = 1, a(2) = 7, for n >= 3, a(n) = smallest prime > a(n-1) such that a(n) mod a(n-1) = a(n-2). A175208

First term of n-th difference sequence of (floor(k·r)), r = -sqrt(3), k >= 0. A325667

Numerators of coefficients in expansion of (sin(x))/(1 - x - x²). A279332

Primes that are not the sum of 3 hexagonal numbers. A117089

Denominators in the series for Bessel function J4(x). A61403

a(1)=1, a(2)=1. For n > 2, start with n and iterate the map (k -> concatenation of anti-divisors of k) until we reach a prime q; then a(n) = q. If we never reach a prime, a(n) = 0. A191648