7891

7891 is a natural number that comes after 7890 and before 7892. In mathematics, it is a composite number.

Its prime factorization is 13 × 607, so 7891 is a semiprime (the product of two distinct primes) and therefore squarefree, with exactly four divisors: 1, 13, 607, and 7891. The number is odd and congruent to 3 modulo 4.

Representations: In hexadecimal it is 0x1ED3, and in binary it is 1111011010011. It is 301 less than 2^13 (8192).

Context: As a four-digit semiprime, 7891 is often cited as an example in elementary number theory for factorization, divisibility, and modular arithmetic. It has no known widely cited constants or widely noted mathematical identities beyond its factorization properties.