186399

186,399 is a natural number that follows 186,398 and precedes 186,400. It is odd and composite. The sum of its decimal digits is 36, making the number divisible by 9 and hence by 3; indeed 186,399 = 9 × 20,711. Its prime factorization is 186,399 = 3^2 × 139 × 149. Consequently the number of positive divisors is (2+1) × (1+1) × (1+1) = 12. The radical of 186,399, the product of distinct prime factors, is 3 × 139 × 149 = 62,133; the square-free part is 139 × 149 = 20,711, and the largest square dividing the number is 9. In modular arithmetic, it is congruent to 0 modulo 9 and 7 modulo 8. The number is neither prime nor a simple figurate number, though it can be described as the product of two nearby primes (139 and 149) times a square factor.

As an integer, 186,399 can appear in contexts such as divisor-function examples, factorization exercises, or coding tasks that require six-digit composites. This concise factorization makes it a representative example of a six-digit composite with a small square factor.