369

369 is a natural number that follows 368 and precedes 370. In decimal notation, it is a three-digit composite number. Its prime factorization is 3^2 × 41, which makes it divisible by 3 and by 9. The sum of its digits is 18, further indicating divisibility by 9.

The divisors of 369 are 1, 3, 9, 41, 123, and 369. The sum of all divisors is 546, while the sum of proper divisors is 177. Therefore, 369 is not a perfect number. It is not a prime, and it is neither a square nor a cube.

In Roman numerals, 369 is written as CCCLXIX. The number’s digits are 3, 6, and 9, all multiples of 3, and the number itself is a multiple of 9.

In mathematics education, 369 is sometimes used as an example for factoring, divisor analysis, and discussions of three-digit composite numbers. Its factorization into 9 × 41 highlights how larger composites can be built from smaller prime factors.

In popular culture, the sequence of digits 3, 6, and 9 has attracted attention in numerology and various online discourses. Such interpretations are cultural or symbolic rather than scientific, and there is no established mathematical or scientific basis for assigning special significance to the number 369 beyond its numerical properties.