13747

13747 is a natural number that follows 13746 and precedes 13748. In number theory, it is notable for being a semiprime: a product of exactly two primes, specifically 59 and 233, since 59 × 233 = 13747. Because of this factorization, its positive divisors are 1, 59, 233, and 13747, giving it a total of four divisors. The digits sum to 22, so the number is not divisible by 3 or 9, and it is odd.

The prime factorization also links 13747 to Fibonacci numbers through the factor 233, which is a Fibonacci number (the 13th term in the standard sequence). This provides a small and incidental connection to Fibonacci-related topics via its prime factors. The other factor, 59, is also prime but does not belong to the Fibonacci sequence.

As a semiprime, 13747 is sometimes used as an introductory example in discussions of prime factorization, divisor counting, and basic properties of composite numbers. It is not associated with any widely recognized constants, historical events, or major scientific concepts beyond its role as a mathematical example.