#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
using ll=long long;
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
template<class T> bool chmax(T &a, T b){if (a < b){a = b;return true;} else return false;}
template<class T> bool chmin(T &a, T b){if (a > b){a = b;return true;} else return false;}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll N;
    cin>>N;
    int cnt=0;
    for(ll x=2;x*x<=N;x++){
        bool flag=false;
        while(N>0&&N%x==0){
            N/=x;
            flag=true;
        }
        if(flag)cnt++;
    }
    if(N>1)cnt++;
    cout<<(cnt==2?"Yes":"No")<<"\n";
}