#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main()
{
    ll x, y = 1, fac = 2;
    cin >> x;
    while (x > fac && x != 1){
        int num = 0;
        while (x % fac == 0) {
            num++;
            x /= fac;
        }
        if (num%2) y *= fac;
        fac++;
    }
    cout << y << endl;
}