Is 357 a Prime Number?

To determine whether the number 357 is a prime number, it is necessary to check if it has any divisors besides 1 and itself. This involves checking if there are any other numbers that can divide 357 evenly, meaning without leaving a remainder. If such divisors exist, 357 is not a prime number; otherwise, it would be classified as prime.

To quickly check if 357 is a prime number:

Calculate the square root of 357

$\sqrt{357} = 18.89$

Prime numbers less than or equal to 18.89: 2, 3, 5, 7, 11, 13, 17

• 357 is divisible by number: 3, 7, 17.

Since 357 is divisible by a number 3, 7, 17 other than 1 and itself, so it is not a prime number