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An emirp number is a prime number which, when you reverse the digits, produces a different prime number. Therefore, there are no single-digit emirp numbers. The first three emirp numbers are: 13, 17, 31
No, it is not.
Yes. The number 347 IS a PRIME NUMBER. This means that the only factors of 347 are 1, and itself (347).
347 * 6 = 2082
347 is already prime.