#include<iostream>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<vector>
#include<map>
using namespace std;
typedef long long ll; 
int main(){
	ios::sync_with_stdio(false);
	ll x,ans=1;
	cin>>x;
	for(int i=2;i<=x/i;i++){
		int cou=0;
		while(x%i==0){
			x/=i;
			cou++;
		}
		if(cou&1)ans*=i;
	}
	if(x>1)ans*=x;
	cout<<ans;

	return 0;
}