#include<iostream>
using namespace std;
int main(){
	int n,i=0;
	cin>>n;
	for(i=2;i<n;i++){
		if(n%i==0){
			cout<<i;
			return 0;
		}
	}
	cout<<"Yes";
}
/**************************************************************
	Problem: 1061
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/