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

int main(){
    ll n;
    cin>>n;
    int cnt = 0;
    for(ll i = 2;i*i<=n;i++){
        if(n%i!=0) continue;
        while(n%i==0){
            n /= i;
        }
        cnt++;
    }
    if(n!=1) cnt++;
    if(cnt<=2) cout<<"Yes\n";
    else cout<<"No\n";
}