#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi  = vector<int>; using vb  = vector<bool>; using vd  = vector<double>; using vl  = vector<ll>;
using vvi = vector<vi>;  using vvb = vector<vb>;   using vvd = vector<vd>;     using vvl = vector<vl>;

pair<vl, vl> primeFactors(ll n){
    vl p,e;
    ll m = n;
    for(ll i = 2; i*i <= n; i++){
        if(m%i != 0) continue;
        int c = 0;
        while(m%i == 0) c++, m /= i;
        p.push_back(i); e.push_back(c);
    }
    if(m > 1){
        p.push_back(m); e.push_back(1);
    }
    return make_pair(p,e);
}

int main() {
	ll n; cin >> n;
	auto v = primeFactors(n);
	ll sum = 0; for (auto& i : v.second) sum += i;
	cout << (sum > 2 ? "YES" : "NO") << endl;
	return 0;
}