It is composite.
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90 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
90 has factors other than 1 and itself, so it is not a prime number. For example, 90 is 9 x 10, so it is a composite number.
As an even number greater than 2, 90 is divisible by 2 and therefore composite.
90 is composite, 117 is prime.
All of them except 97 which is a prime number because it has only two factors which are itself and one.