#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
	ll x;
	cin >> x;
	ll ans = 1;
	for (ll i = 2;i*i <= x;i++) {
		if (x%i == 0) {
			if (ans%i == 0) {
				ans /= i;
			}
			else {
				ans *= i;
			}
			x /= i--;
		}
	}
	if (ans%x == 0) {
		ans /= x;
	}
	else {
		ans *= x;
	}
	cout << ans << endl;
	return 0;


}