#include <iostream>
#include <stdio.h>
#include <cstring>
#include <math.h>
#include <algorithm>
#include <vector>
#define rep(i,n) for(int i=0;i<n;i++)
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define ll long long
#define LL long long
#define mass 1000000007
using namespace std;


int main(){
	ll x;
	cin>>x;
	ll y=1;
	int cnt=0;
	while(x%2==0){
		x/=2;
		cnt++;
	}
	if(cnt%2!=0){
		y*=2;
	}
	

	for(ll i=3;i*i<=x;i+=2){
		cnt=0;
		while(x%i==0){
			x/=i;
			cnt++;
		}
		if(cnt%2!=0){
			y*=i;
		}
	}
	if(x>1){
		y*=x;
	}
	cout<<y<<endl;

	return 0;
	

}