#打卡

#include<iostream>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<vector>
#include<map>
#include<stack>
#define ll long long
using namespace std;
int main(){
	ios::sync_with_stdio(false);
	ll n,an,ans=1;
	cin>>n;
	for(int i=2;i*i<=n;i++){
		an=0;
		while(n%i==0){
			an++;
			n=n/i;
		}
		if(an%2!=0) ans*=i;
	}
	ans*=n;
	cout<<ans<<endl;
	return 0;
}