#include <iostream>
#include <cstdint>

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;
  }
  int64_t ans = 1;
  int count = 0;
  for (int64_t i = 2; i * i <= n; i++) {
    while (n % i == 0) {
      n /= i;
      count++;
    }
    if (count & 1) {
      ans *= i;
    }
    count = 0;
  }
  if (n > 1) {
    ans *= n;
  }
  cout << ans << endl;
}