#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

int main() {
    ll x;
    cin >> x;

    ll ans = 1;

    srep(i,2,10000000){
        ll ii = i;
        if(x % ii == 0){
            int cnt = 0;
            while(x % ii == 0){
                cnt++;
                x /= ii;
            }
            if(cnt % 2 == 1)ans *= ii;
        }
    }

    if(x > 1)ans *= x;

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