#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int x;
  cin>>x;
  Int y=1;
  for(Int i=2;i*i<=x;i++){
    Int k=0;
    while(x%i==0) x/=i,k++;
    if(k&1) y*=i;
  }
  y*=x;
  cout<<y<<endl;
  return 0;
}