#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cctype>
#include<cstdlib>
#include<algorithm>
#include<bitset>
#include<vector>
#include<list>
#include<deque>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<cmath>
#include<sstream>
#include<fstream>
#include<iomanip>
#include<ctime>
#include<complex>
#include<functional>
#include<climits>
#include<cassert>
#include<iterator>
#include<unordered_set>
#include<unordered_map>
using namespace std;

int main() {
	long long int x;
	scanf("%lld", &x);
	for (long long int i = 2;i*i <= x;i++) {
		while(x%(i*i) == 0) {
			x /= i*i;
		}
	}
	printf("%lld\n", x);
	return 0;
}