#include<iostream>
#include<map>
#include<vector>
#include<cmath>

int main(){
    long long n;
    std::cin >> n;

    std::map<long long, long long> m;
    std::vector<long long> v;

    long long l = sqrt(n);
    for(long long i = 2; i <= l; i++){
        if(n % i == 0) v.push_back(i);
        while(n % i == 0){
            m[i]++;
            n /= i;
        }
    }
    v.push_back(n);
    m[n]++;

    long long ans = 1;
    for(long long i : v){
        if(m[i] % 2 == 1) ans *= i;
    }

    std::cout << ans << std::endl;
    return 0;
}