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