#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n,fg,ans=1;
int main()
{
	cin>>n;
	for(ll i=2;i*i<=n;++i)
	{
		fg=0;
		while(n%i==0)
		{
			fg++;
			n/=i;
		}
		if(fg%2!=0) ans*=i;
	}
	ans*=n;
	cout<<ans<<"\n";
	
	return 0;
 }