7173

7173 is a natural number that follows 7172 and precedes 7174. In mathematics, it is an odd composite number. Its prime factorization is 3^2 × 797, with 797 being prime. Therefore, 7173 is not a prime, nor a power of a single prime. The sum of its digits is 18, which makes the number divisible by 9 and by 3. Its remainder when divided by 4 is 1, so it is congruent to 1 modulo 4. In base 10, its digit pattern is 7-1-7-3, and it is not a palindrome.

The number lies between 7000 and 8000, placing it in the eighth millennium if interpreted as a year. There are no widely known mathematical constants or theorems uniquely associated with 7173, but as with many integers, it appears in problem contexts as an example of a composite number with relatively small prime factors. In addition to its factorization, 7173 serves as a representative example in discussions of divisibility and modular arithmetic for four-digit integers.

As a four-digit integer, 7173 is neither a square nor a triangular number, and it is not a Harshad (Niven) number since it is not divisible by the sum of its digits (18). Its properties—being odd and composite with a small prime factorization—make it a typical case in basic number theory education.