#include <algorithm>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <vector>
using namespace std;
typedef long long int ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
#define rep(i,x) for(int i=0;i<(int)(x);++i)

int main(){
	int cnt = 0;
	ll n, m;
	cin >> n;
	for (ll i=2, m=n; i*i<=n; ++i) {
		while (!(m%i)) {
			m /= i;
			++cnt;
			if (cnt>2) break;
		}
	}
	if (m>1) ++cnt;
	cout << (cnt>2 ? "YES" : "NO") << endl;
	return 0;
}