The prime factors are: 2 3 5
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90 is composite, 117 is prime.
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 prime numbers from 70 to 90 are: 71 73 79 83 and 89.
It is not possible to multiply two prime numbers and get 90. You can add 43 and 47.
There are 2 prime numbers between 80 and 90: 83 89