# include <bits/stdc++.h>
using namespace std;
typedef long long ll; 
# define int long long
# define lc u << 1
# define rc u << 1 | 1
# define fi first
# define se second

int x;
signed main ()
{
//	freopen ("square.in", "r", stdin); freopen ("square.out", "w", stdout);
	scanf ("%lld", &x);
	for (int i = 2; i * i <= x; i ++ )
	{
		while (x % (i * i) == 0)
			x /= (i * i);
	}
	printf ("%lld", x);
	return 0;
}