#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
    #define eprintf(...) fprintf(stderr, __VA_ARGS__)
#else
        #define eprintf(...) 42
#endif

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=(int)(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define foreach(u,v) for(auto (u) : (v))
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;

const int inf = 1e9;
const ll linf = 1LL<<60;
const ll mod = 1e9 + 7;
const double eps = 1e-9;

/*
*/

int main()
{
  ll x;
  cin >> x;

  vector<pll> p;
  for(int i = 2; i <= x/i; i++){
    int cnt = 0; 
    while(x%i == 0){
      cnt++;
      x /= i;
    }
    if(cnt) p.pb(mp(i, cnt));
  }
  if(x != 1) p.pb(mp(x, 1));

  ll ans = 1;
  for(auto q : p){
    if(q.second%2 == 1){
      ans *= q.first;
    }
  }

  cout << ans << endl;

  return 0;
}