Prime power

Definition
A prime power is a natural number that is a power of a prime number. The first few prime powers are $$1,2,3,4,7,8,9,11,13,16,17,19,23,25,27,29,31,32,\dots$$.

Facts

 * A finite group whose order is a prime power is termed a group of prime power order. Any group of prime power order is a nilpotent group.

Subject wiki links

 * number theory wiki