import java.util.Scanner;

public class Yukicoder300 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long x = sc.nextLong(), y = 1;
        double z;

        for (int i = 2; i < 1000; i++) {
            if (x % (i * i) == 0) x /= (i * i);
        }
        
        for (y = 1; y <= x; y++) {
            z = (int) Math.sqrt(x * y);
            if (z * z == x * y) break;
        }
        System.out.println(y);
    }
}