#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;

using ll = long long;
using ld = long double;

int main()
{
	ll n; cin >> n;
	ll sum = 0;
	for(ll i = 1; i * i <= n; i++) {
		if(n % i == 0) {
			sum += i;
			if(i * i != n) sum += n / i;
		}
	}
	if(sum == 2 * n) cout << "Yes" << endl;
	else cout << "No" << endl;
}