#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
	ll n;
	cin >> n;
	for(ll p = 2; p * p <= n; p++){
		if(n % p == 0){
			while(n % p == 0) n /= p;
			break;
		}
	}
	ll tmp = n;
	for(ll q = 2; q * q <= n; q++){
		if(n % q == 0){
			while(n % q == 0) n /= q;
			break;
		}
	}
	cout << (n == 1 or tmp == n ? "Yes" : "No") << '\n';
}