#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    ll N;
    cin >> N;

    int P = 0;
    for (ll n = 2; n*n <= N; n++){
        if (N%n == 0){
            while (N%n == 0) N /= n;
            if (++P > 2){
                cout << "No" << endl;
                return 0;
            }
        }
    }

    P += (N != 1);
    cout << (P <= 2? "Yes": "No") << endl;
}