#include using namespace std; using ll = long long; int main() { cin.tie(0); ios_base::sync_with_stdio(0); ll n; cin >> n; int cnt = 0; for (ll i = 2; i * i <= n; i++) { if (n % i == 0) { while (n % i == 0) { n /= i; } cnt++; } } if (n > 1) cnt++; cout << (cnt <= 2 ? "Yes" : "No") << '\n'; return 0; }