#include <iostream>
#include <string>
#include <vector>
#include <map>
using namespace std;

int main() {
	long long int x,n;
	vector<pair<int, int> > ans;
	cin >> x;

	n = 2;
	while (x != 1){
		int cnt = 0;
		while (!(x%n)){
			x = x / n;
			cnt++;
		}
		if (cnt){
			ans.push_back(make_pair(cnt, n));
		}
		n++;
	}

	long long int y=1;
	for (int i = 0; i < ans.size(); i++){
		if (ans[i].first % 2){
			y *= ans[i].second;
		}
	}

	cout << y << endl;

	return 0;
}