#include <iostream>
#include <cstdint>
#include <vector>

using namespace std;

int main() {

  ios::sync_with_stdio(false);
  cin.tie(0);

  int64_t n;
  cin >> n;
  if (n == 1) {
    cout << "1" << endl;
    return 0;
  }
  int evencount = 0;
  if (!(n & 1)) {
    while (!(n & 1)) {
      n >>= 1;
      evencount++;
    }
  }
  if (n == 1) {
    if (evencount & 1) {
      cout << "2" << endl;
    } else {
      cout << "1" << endl;
    }
    return 0;
  }
  vector<int> v;
  if (evencount & 1) {
    v.push_back(2);
  }
  int oddcount = 0;
  for (int i = 3; i <= n; i += 2) {
    if (n % i == 0) {
      while (n % i == 0) {
        n /= i;
        oddcount++;
      }
      if (oddcount & 1) {
        v.push_back(i);
      }
    }
    oddcount = 0;
  }
  int64_t ans = v.at(0);
  for (int i = 1; i < (int)v.size(); i++) {
    ans *= v.at(i);
  }
  cout << ans << endl;
}