# Which of the following is a prime number?

23882990

1714

16769023

12581

38377296

1607

11723835

2787

A prime number has no positive divisors other than 1 and itself. Hence, a prime bigger than 2 cannot be even. All prime numbers bigger than 5, written in the usual decimal system, end in 1, 3, 7, or 9.

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Illustration: Procsilas Moscas