#include <bits/stdc++.h>
#define PB push_back
#define MP make_pair
#define REP(i,n) for (int i=0;i<(n);i++)
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define ALL(a) (a).begin(),(a).end()
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<string,string> P;
const int INF=1e9+1;
int main(){
      map<ll,int>M;
      ll x,y=1;
      cin>>x;
      for(int i=2;i<=x;i++){
            while(x%i==0){
                  x/=i;
                  M[i]++;
            }
      }
      map<ll,int>::iterator it;
      for(it=M.begin();it!=M.end();it++){
            if(it->second%2==1){
                  y*=it->first;
            }
      }
      cout<<y<<endl;
}