#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef pair<int, int> PII;

#define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define ALL(x) x.begin(), x.end()
#define MOD 1000000007
#define INF (1LL<<25)     //33554432
#define PI 3.14159265359
#define EPS 1e-12
//#define int ll

signed main(void)
{
  ll n;
  cin >> n;

  VL v;
  for(ll i=1; i*i<=n; ++i) {
    if(n%i == 0) {
      v.push_back(i);
      if(i*i != n) v.push_back(n/i);
    }
  }

  sort(ALL(v));
  for(ll i: v) {
    if(i == 1 || i == n) continue;
    //iの素数判定
    bool flag = true;
    for(ll j=2; j<=sqrt(i); ++ j) {
      if(i%j == 0) flag = false;
    }
    if(!flag) {
      cout << "YES" << endl;
      return 0;
    }
  }

  cout << "NO" << endl;
  return 0;
}