#include<bits/stdc++.h>
using namespace std;

int main(){
	cin.tie(0),ios::sync_with_stdio(false);
	int64_t x; cin>>x;
	unordered_map<int64_t,int>m;
	for(int64_t i=2;i*i<=x;++i){
		if(x%i)continue;
		while(x%i==0){
			++m[i];
			x/=i;
		}
	}
	if(x>1)++m[x];
	int64_t ans=1;
	for(auto&&i:m){
		if(i.second%2)ans*=i.first;
	}
	cout<<ans<<"\n"s;
}