#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)

using namespace std;
using ll = long long;
  
int main() {  
    ll n;
    cin >> n;
    
    ll sum = 0;
    for (ll i = 1; i*i <= n; ++i) {
        if (n%i == 0) {
            sum += i;
            if (n/i != i) sum += n/i;
        }
    }
    
    if (sum == n*2) puts("Yes");
    else puts("No");
    
    return 0;  
}