// No.300 平方数
// https://yukicoder.me/problems/no/300
//

#include <iostream>
#include <unordered_map>
using namespace std;

long long int solve(long long int X);
unordered_map<int, int> prime_factor(long long int X);

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    long long X;
    cin >> X;

    long long ans = solve(X);
    cout << ans << endl;
}

long long int solve(long long int X) {
    unordered_map<int, int> res;
    res = prime_factor(X);
    long long ans = 1;
    for (auto f: res) {
        if (f.second % 2 == 1) {
            ans *= f.first;
        }
    }
    return ans;

}

unordered_map<int, int> prime_factor(long long int X) {
    unordered_map<int, int> res;
    for (long long i = 2; i*i <= X; ++i) {
        while (X % i == 0) {
            ++res[i];
            X /= i;
        }
    }
    if (X != 1)
        res[X] = 1;
    return res;
}