#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef pair<int, int> PII;

#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
#define MOD 1000000007
#define INF (1LL << 25) // 33554432
#define PI 3.14159265359
#define EPS 1e-12
//#define int ll

signed main(void) {
  ll x;
  cin >> x;

  map<ll, ll> v;
  ll a = 2;
  while(x >= a*a) {
    //cout << x << " " << a << endl;
    if(x % a == 0) {
      v[a]++;
      x /= a;
    } else {
      a++;
    }
  }
  v[x]++;
  ll ret = 1;
  for(auto itr = v.begin(); itr != v.end(); ++itr) {
    //cout << itr->first << " " << itr->second << endl;
    if(itr->second % 2 == 1) {
      ret *= itr->first;
    }
  }
  cout << ret << endl;
  //for(ll i: v) cout << i << " "; cout << endl;

  return 0;
}