#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin>>a;
	for(int i=2;i<a;i++){
		if(a%i==0){
			cout<<i;
			return 0;
		}
		
	}
	cout<<"Yes";
} 
/**************************************************************
	Problem: 1061
	User: zhengzihao
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/