#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  ll x;
  cin >> x;
  vector<pair<ll, ll>> pf;
  for (ll i = 2; i * i <= x; i++) {
    if (x % i == 0) {
      ll cnt = 0;
      while (x % i == 0) {
        x /= i;
        cnt++;
      }
      pf.push_back({ i, cnt });
    }
  }
  if (x > 1) {
    pf.push_back({ x, 1 });
  }
  ll ans = 1;
  for (auto [p, e] : pf) {
    if (e % 2 == 1) ans *= p;
  }
  cout << ans << '\n';
  return 0;
}