#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
#endif
using ll = long long;
using ld = long double;
const ll INF = 1ll<<60;
const ld EPS = 1.0/1e9;
#define endl "\n"
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
#define del(x) sort(all(x)); x.erase(unique(all(x)),x.end());

int main(){
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  ll n; cin >> n;
  ll cnt=0;
  vector<ll>lp(n+1);
  vector<ll>pr;
  for(int i=2;i<=n;i++){
    if(lp[i]==0){
      lp[i]=i;
      pr.push_back(i);
    }
    for(int j=0;j<(int)pr.size() && pr[j]<=lp[i] && i*pr[j]<=n;j++){
      lp[i*pr[j]]=pr[j];
    }
  }
  map<ll,ll>mp;
  while(n!=1){
    mp[lp[n]]++;
    n/=lp[n];
  }
  fore(c,mp){
    if(c.second>1){
      cout << "YES" << endl;
      return 0;
    }
  }
  cout << "NO" << endl;
}