#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;

int main()
{
	ll X;
	ll ans = 1;
	cin >> X;

	for (ll i = 2; i * i <= X; i++) {
		ll cnt = 0;
		while (X % i == 0) {
			X /= i;
			cnt++;
		}
		if (cnt % 2 != 0)
			ans *= i;
	}
	
	if (X > 1) {
		ans *= X;
	}

	cout << ans << endl;
	return 0;
}