#include<iostream>
using namespace std;
typedef long long LL;
int main()
{
    LL n;
    cin >>n;
    LL res = 1;
    for(LL i = 2; i * i <= n; i ++)
    {
        if(n % i == 0)
        {
            int cnt = 0;
            while(n % i == 0)cnt ++, n /= i;
            if(cnt % 2)res *= i;
        }
    }
    if(n > 1)res *= n;
    cout << res;
}