#include <iostream>

void factorize(unsigned n)
{
    int m = 1;

    bool flag = false;
    while (n % 2 == 0) {
        flag = !flag;
        n /= 2;
    }

    if (flag) {
        m *= 2;
    }

    for (int p = 3; p * p <= n; p += 2) {
        bool flag = false;
        while (n % p == 0) {
            flag = !flag;
            n /= p;
        }

        if (flag) {
            m *= p;
        }
    }

    if (n > 1) {
        m *= n;
    }

    std::cout << m << std::endl;
}

int main(void)
{
    unsigned n;
    std::cin >> n;

    factorize(n);

    return 0;
}