#include <bits/stdc++.h>
using namespace std;
#define all(v) (v).begin(),(v).end()
#define pb(a) push_back(a)
#define rep(i, n) for(int i=0;i<n;i++)
#define foa(e, v) for(auto& e : v)
using ll = long long;
const ll MOD7 = 1000000007, MOD998 = 998244353, INF = (1LL << 60);
#define dout(a) cout<<fixed<<setprecision(10)<<a<<endl;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n;
    cin >> n;
    ll ans = 0;
    for(ll i = 1; i * i <= n; i ++) {
        if(n % i == 0) {
            if(i * i != n) ans += n/ i ;
            ans += i;
            if(ans > n * 2) {
                cout << "No" << endl;
                return 0;
            }
        }
    }
    cout << (ans == n * 2 ? "Yes" : "No") << endl;
    return 0;
}