#include <bits/stdc++.h>

using namespace std;

#define fst(t) std::get<0>(t)
#define snd(t) std::get<1>(t)
#define thd(t) std::get<2>(t)
#define unless(p) if(!(p))
#define until(p) while(!(p))

using ll = long long;
using P = std::tuple<int,int>;

const int dx[8] = {-1, 1, 0, 0, -1, -1, 1, 1}, dy[8] = {0, 0, -1, 1, -1, 1, -1, 1};

int main(){
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    ll X;
    std::cin >> X;

    ll res = 1ll;
    for(ll i=2;i*i<=X;++i){
        int cnt = 0;
        while(X % i == 0){
            ++cnt;
            X /= i;
        }

        if(cnt & 1){
            res *= i;
        }
    }

    if(X > 1){res *= X;}

    std::cout << res << std::endl;
}