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

int main() {
    long x, y = 1;
    cin >> x;
    for (long i = 2; i * i <= x; i++) {
        int n = 0;
        while (x % i == 0) {
            n++;
            x /= i;
        }
        if (n % 2 == 1) y *= i;
    }
    cout << x * y << endl;
}