#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	for(int i=2;i*i<=n;i++){
		if(n%i==0){
			cout<<i<<endl;
			return 0;
		}
	}
	cout<<"Yes"<<endl;
	return 0;
}
/**************************************************************
	Problem: 1061
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/