#include <iostream>
#include <vector>
using namespace std;
int main(){
    int N;
    cin>>N;
    vector<char> V;
    V.push_back('A');
    V.push_back('A');
    bool p=true;
    if(N<V.size()){
        cout<<"NO"<<endl;
    }else{
        while(V.size()<N){
            if(!(N%V.size())){
                p=false;
                break;
            }
            V.push_back('A');
        }
        cout<<(p?"YES":"NO")<<endl;
    }
}