#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i = (a); i < (b); ++i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) for(int i = (n) - 1; (i) >= 0; --i)
#define SZ(n) (int)(n).size()
#define ALL(n) (n).begin(), (n).end()
#define MOD LL(1e9 + 7)
#define INF 1000000
using namespace std;
typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PI;

int main() {
	LL x;
	cin >> x;
	map<LL, LL> mp;
	for (LL i = 2; i * i <= x; i++) {
		if (x % i == 0) {
			while (x % i == 0) {
				mp[i]++;
				x /= i;
			}
		}
	}
	mp[x]++;
	LL ans = 1;
	for (auto e : mp) {
		if (e.second % 2 == 1)
			ans *= e.first;
	}
	cout << ans << endl;
	return 0;
}