17987

17987 is a natural number that follows 17986 and precedes 17988. It is a five-digit integer in base 10 and is odd.

In mathematics, 17987 is a prime number, meaning it has exactly two distinct positive divisors: 1 and itself. As a prime, it does not factor into smaller integers and is part of the sequence of prime numbers used in various theoretical and applied contexts.

Numerical characteristics include its decimal representation ending in 7 and a digit sum of 32, which confirms it is not divisible by 2 or 3 and is not a multiple of 5. Its primality can be established by checking divisibility with prime numbers up to its square root, which is approximately 134; in practice, this involves testing divisibility by primes up to 131.

Contextually, while 17987 does not have widely cited special properties beyond its status as a prime, it can appear in mathematical examples, problem sets, or discussions of prime testing and number theory. Like other primes, it serves as a basic building block in the study of integers and their factorization.