#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
typedef long long ll;

int main(){
	ll n; cin>>n;
	map<ll,int> mp;
	ll m=n; ll i=2;
	while(1){
		if(n%i==0){mp[i]++; n/=i; i=2;
		}else{i++;}
		if(i>m/2||n==1) break;
	}
	if(mp.empty()) cout<<"NO"<<endl;
	else cout<<"YES"<<endl;
}