#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;




int main() {
	

	
	long long int n,t=1;
	cin>>n;
	//if(n%3==0)cout<<"#";
	for(long long int i=2;i*i<=n;i++)if(n%i==0){
		//if(i>2&&i%2==0)i++;
		{
long long  int g=0;
	while(n%i==0){
		n/=i;g++;
	}
	if(g%2)t*=i;
		}
		//cout<<i<<endl;;
	}
	t*=n;
	cout<<t<<endl;
	return 0;
}