Prime number : 6.5 factor: 13, 3,
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Neither 39 nor 27272 is prime. 39 can be divided by 3 and 27272 can be divided by 2. They both have at least one factor besides 1 and the number themselves. They are composite. The digit in 39 that is prime is 3. The digit in 27272 that is prime is 7.
39 is not a prime number.
13 is a prime number and 39 isint a prime number
39 and 45 are not relatively prime because they have 3 as a common factor. Relatively prime numbers have no common factor greater than 1.