13817

13817 is a natural number that follows 13816 and precedes 13818. It is an odd integer and, in mathematical terms, it has a basic factorization that informs its classification among integers.

In mathematics, 13817 is a semiprime, since it factors into two primes: 41 and 337. Both 41 and 337 are prime, so 13817 = 41 × 337. Its digit sum is 20, which means it is not divisible by 3, and it does not end in 0 or 5, so it is not divisible by 5. The nearest numbers in the Fibonacci sequence are 10946 (F21) and 17711 (F22), placing 13817 outside the Fibonacci numbers. The number is not a perfect square, and its prime factorization shows it has exactly two prime factors.

In astronomy, 13817 appears as the numerical designation of a minor planet. The Minor Planet Center assigns numbers to confirmed minor planets in sequential order; when such an object is named, the name is added to the numeric designation, for example (13817) followed by its official name. Thus 13817 identifies a specific object in the solar system but may or may not carry a widely used name.

Beyond mathematics and astronomy, 13817 can serve as a generic identifier in catalogs, inventories, or coding schemes where long lists of sequential numbers are used. As a finite integer with a simple factorization, it has standard numerical properties without special cultural or historical associations.