Is 89 a prime number?

Eighty-nine is a prime number. To check for a prime number, divide it by every number from two to one less than the number (88 in this case). If no smaller number can be evenly divided into the number, which is the case for 88, then it is prime.

Prime numbers are a special group of numbers that have no factors other than one and themselves. A factor of a number refers to any number that can be divided into a number to yield a whole result. For example, four is a factor of 12 because 12 divided by four works out evenly to yield three.