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

bool bso[1000000];

int main(){
	for (int i = 3; i < 1000000; i += 2) {
		int j;
		if (!bso[i]) {
			for (int j = i + i; j <= 1000000; j += i) {
				bso[j] = true;
			}
		}
	}

	long long int x;
	vector<pair<int, int> > ans;
	cin >> x;

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

	for (long int i = 3; i <= 1000000;) {
		cnt = 0;
		while (!(x%i)) {
			x = x / i;
			cnt++;
		}
		if (cnt) {
			ans.push_back(make_pair(cnt, i));
		}
		if (x == 1) break;
		i += 2;
		while (bso[i])i+=2;
	}

	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;
}