7409

7409 is a natural number that follows 7408 and precedes 7410. In mathematical terms, it is notable for being a semiprime, that is, the product of exactly two prime numbers.

The prime factorization of 7409 is 31 × 239. Both 31 and 239 are primes, so 7409 has precisely two prime factors (counting multiplicity). The number is odd and not divisible by 3 or 5, and its last digit is 9. The digital sum is 20, which confirms it is not divisible by 3. It is congruent to 1 modulo 4 since 31 ≡ 3 (mod 4) and 239 ≡ 3 (mod 4), and the product of two numbers congruent to 3 modulo 4 is congruent to 1 modulo 4. Additionally, 7409 is square-free, as the factorization contains no repeated prime factors, and it is not a perfect square.

In broader contexts, 7409 may appear as a numeric identifier in catalogs, part numbers, or other labeling systems. Beyond its mathematical properties, there is no widely recognized historical or cultural significance universally attributed to the number 7409. Its primary interest to readers is largely mathematical, particularly its status as a semiprime and its simple prime factorization.