#include <iostream>
using namespace std;
typedef long long ll;
int main( void )
{
  ll x;
  cin >> x;
  ll ret = 1;
  int cnt = 0;
  while( x % 2 == 0 ){
    cnt++; x /= 2;
  }
  if( cnt % 2 ) ret *= 2;
  for( ll i=3; x >= i*i; i+=2 ){
    if( x % i == 0 ){
      cnt = 1; x /= i;
      while( x % i == 0 ){
        cnt++; x /= i;
      }
      if( cnt % 2 ) ret *= i;
    }
  }
  if( x > 1 ) ret *= x;
  cout << ret << endl;
}