90 is composite, 117 is prime.
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3x3x13
89 and 91 are both prime numbers, so when asked the prime number closest to 90, the answer is that 90 is surrounded by two prime numbers
The common prime factors of 27 and 117 are the prime numbers that can divide both 27 and 117 without leaving a remainder. The prime factorization of 27 is 3 x 3 x 3, and the prime factorization of 117 is 3 x 3 x 13. The only common prime factor between 27 and 117 is 3, as it is the only prime number that appears in the factorization of both numbers.
The prime factors are: 2 3 5
The prime numbers from 70 to 90 are: 71 73 79 83 and 89.