#include<bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    ll n;
    cin >> n;
    ll m = n;
    ll cnt = 0;
    for(ll i = 2;i*i <= n;i++){
        if(m % i != 0) continue;
        cnt++;
        if(cnt > 2){
            cout << "No" << endl;
            return 0;
        }
        while(m % i == 0){
            m /= i;
        }
    }

    if(cnt <= 2){
        cout << "Yes" << endl;
    }
    else{
        cout << "No" << endl;
    }
}