#include<bits/stdc++.h>
using namespace std;
int main(){
	int n=1,a=0,f=1;
	cin>>n;
	for(int i=2;i<n;i++){
		if(n%i==0){
			a=i;
			f=0;
			break;
		}
	}
	if(f==0){
		cout<<a;
	}
	else cout<<"Yes";
    

	return 0;
}

/**************************************************************
	Problem: 1061
	User: zhuanghaoxiang
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/