SquareFreeQ

SquareFreeQ[expr] gives True if expr is a square-free polynomial or number, and False otherwise.

SquareFreeQ[expr, vars] gives True if expr is square free with respect to the variables vars.

Examples

Test if a number is square-free:

SquareFreeQ[30]
(* True *)

Test a non-square-free number:

SquareFreeQ[12]
(* False *)

Please visit the official Wolfram Language Reference for more details.