#include<iostream>
#include<vector>
#include<string>
#include<algorithm>	
#include<map>
#include<set>
#include<utility>
#include<cmath>
#include<cstring>
#include<queue>
#include<stack>
#include<cstdio>
#include<sstream>
#include<iomanip>
#include<assert.h>
#include<ctime>
#include<cstdlib>
#include<numeric>
using namespace std;
typedef long long ll;
#define loop(i,a,b) for(ll i=a;i<b;i++)
#define rloop(i,a,b) for(int i=a;i>b;i--)
const int inf=1e8;
const ll INF=1e16;
#define MOD 1000000007
#define mod 1000000009
#define m 1000003

int main(){
	ll n;
	cin>>n;
	int cnt=0;
	loop(i,2,sqrt(n)+1){
		if(n%i==0){
			cnt++;
			n=n/i;
			break;
		}
	}
	if(cnt==1){
		loop(i,2,sqrt(n)+1){
			if(n%i==0){
				cnt++;
				n=n/i;
				break;
			}
		}
	}
	if(cnt==2 && n!=1){
		cout<<"YES"<<"\n";
	}else{
		cout<<"NO"<<"\n";
	}
}