#define _USE_MATH_DEFINES
#include <algorithm>
#include <cstdio>
#include <functional>
#include <iostream>
#include <cfloat>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <map>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <time.h>
#include <vector>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<ll, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<ll, ll> ll_ll;
typedef pair<double, double> d_d;
struct edge { int u, v; ll w; };

ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

int main() {
	ll X, Y = 1; cin >> X;
	vector<ll> ps;
	for (ll p = 2; p * p <= X; p++)
		if (X % p == 0) {
			int cnt = 0;
			for (; X % p == 0; X /= p) cnt++;
			if (cnt % 2) ps.push_back(p);
		}
	if (X > 1) ps.push_back(X);
	for (int i = 0; i < ps.size(); i++)
		Y *= ps[i];
	cout << Y << endl;
}