import java.util.*;
import java.io.*;
import java.math.*;

public class No300 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long x = sc.nextLong();
		int s = 2;
		int c = 0, y = 1;
		while(x > 1) {
//			System.out.println("x = " + x + ", c = " + c + ", y = " + y);
			if(x%s == 0) {
				c += 1;
				x = x/s;
			}else {
				if(c%2 != 0) {
					y *= s;
				}
				s += 1;
				c = 0;
			}
		}
		if(c%2 != 0) y *= s;
		System.out.println(y);
	}
}