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Because it only has 2 factors

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Q: Why is 397 a prime number?
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Continue Learning about Math & Arithmetic

What is the prime factorization of 397?

397 is a prime number, therefore prime factorization of 397 = 397.


Is 397 a prime number or composite number?

397 is a prime number.


Is the number 397 prime or composite?

Since 397 is divisible by only itself and 1, it is a prime number.


What goes into 397?

The number 397 is a prime number, so it only has two factors: 1 and 397.


Is the number 397 a prime number or a composite number?

397 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are every other positive integer except 1 and 0. 1 and 0 are neither prime, nor composite.