#include <iostream>
using namespace std;

int main()
{
	// input
	long long int input, x;
	cin >> input;
	x = input;

	// solve
	for (long long i = 2; i * i <= x; i++) {
		//cout << "[for]: " << i << endl;
		for (int j = 0; j < input; j++) {
			//cout << "[Next] " << x << " % " << i*i << endl;
			if ((x % (i * i)) == 0) {
				x = x / (i * i);
				//cout << x << endl;
			}
			else {
				break;
			}
		}
	}
	cout << x << endl;
    return 0;
}