#include<bits/stdc++.h>
using namespace std;

#define int long long

typedef pair<int,int>pint;
typedef vector<int>vint;
#define pb push_back
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define rep(i,n) for(int i=0;i<(n);i++)
template<class T,class U>void chmin(T &t,U f){if(t>f)t=f;}
template<class T,class U>void chmax(T &t,U f){if(t<f)t=f;}


signed main(){

    int X;
    cin>>X;
    int Y=1;

    for(int i=2;i*i<=X;i++){
        int cnt=0;
        while(X%i==0){
            X/=i;
            cnt++;
        }
        if(cnt&1)Y*=i;
    }
    if(X!=1)Y*=X;
    cout<<Y<<endl;
    return 0;
}