Yes, by definition a composite number is a number that is divisible by another whole number besides one and itself. The only other whole number that nine is divisible by is three.
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Thirty-nine is NOT a prime number. It is composite.
99 (Ninety nine) is composite, because it can be multiplied by 11, and 1.
Seven million, nine hundred thousand. (composite).
The only prime number in the 90s is 97. So out of ten numbers one is a prime number and the remaining nine numbers are composite numbers. So 90s comprises of both prime numbers and composite numbers.
It is a composite number.