No, 98 is divisible by 2; therefore, it is a composite number.
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No.
No. It is divisible by 7. 7*7 = 49
17 is a prime number because it has only two factors which are itself and one.
3 x 3 x 7 = 63
Factors of prime numbers are only 1 and itself. Nothing else.The factors of 98 are 1, 2, 7, 14, 49, and 98. So, it is not prime.