#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000
#define int long long

int cnt[10000010];

signed main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int X; cin >> X;
	REP(i, 2, 10000000) {
		while (X % i == 0) {
			cnt[i]++;
			X /= i;
		}
	}
	int Y = 1;
	REP(i, 2, 10000000) {
		if (cnt[i] % 2 == 1) Y *= i;
	}
	cout << X * Y << endl;


    return 0;
}