#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define rep(i, n) for(ll i = 0; i < (n); i++)
#define reps(i, l, r) for(ll i = (l); i < (r); i++)
#define all(a) (a).begin(), (a).end()
#define endl "\n";
const ll INF = 2e18;
const ll mod1 = 1000000007;
const ll mod2 = 998244353;
ll dx[4] = {-1, 0, 1, 0};
ll dy[4] = {0, -1, 0, 1};
void chmin(ll& a, ll b){ if(a > b) a = b; }
void chmax(ll& a, ll b){ if(a < b) a = b; }
void solve() {
  ll N; cin >> N;
  ll ans = 0;
  for (ll i = 1; i * i <= N; i++) {
    if (N % i == 0) {
      ans += i;
      if (N / i != i) ans += N / i;
    }
  }
  cout << (ans == 2 * N ? "Yes" : "No") << endl;
}
signed main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  ll T = 1; //cin >> T;
  while (T--) solve();
}