Yes, 390 is a composite number. It has factors other than 1 and 390.
The factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, and 390.
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A composite number has three or more factors.
A composite factor is a factor that is a composite number, as opposed to a prime factor which is a factor that is a prime number.
139 is a prime number. Prime numbers have only one prime factor: the numbers themselves.
All natural numbers (counting numbers) greater than one are either prime or composite. If divisible by only one and the number itself, it is prime; if divisible by other natural numbers, then is composite. One is the only natural number that is neither prime nor composite.
a composite number