#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i,l,r) for(ll i=(l);i<(r);++i)

int main(){
	ll n; cin>>n;
	vector<ll> fc;
	for(ll i=2; i*i<=n; i++){
		while(n%i==0){
			fc.push_back(i); n/=i;
		}
	}
	if(n!=1) fc.push_back(n);
	if(fc.size()>2) cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
}