#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)s; i < (int)e; ++i)
#define all(a) (a).begin(),(a).end()

vector<pair<ll, ll>> prime_factorize(ll n) {
    vector<pair<ll, ll>> res;
    for (ll i = 2; i * i <= n; i++) {
        if (n % i != 0) continue;
        ll ex = 0;
        
        while (n % i == 0) {
            ex++;
            n /= i;
        }
        
        res.push_back(make_pair(i, ex));
    }
    
    if (n != 1) res.push_back(make_pair(n, 1));
    return res;
}

int main() {
    cin.tie(nullptr);
    
    ll X;
    cin >> X;
    vector<pair<ll, ll>> primes = prime_factorize(X);
    
    ll ans = 1;
    rep(i, 0, primes.size()) {
        if (primes[i].second % 2 == 1) ans *= primes[i].first;
    }
    
    cout << ans << '\n';
}