#include<stdio.h>
#include<math.h>
using namespace std;

int one;
int add(int a, int b) {
	while (b) {
		int c = (a&b) << one;
		a ^= b;
		b = c;
	}
	return a;
}
bool ok(int n) {
	for (int i = (one << one); i <= sqrt(n); i = add(i, one)) {
		if (!(n%i))return false;
	}
	return true;
}
int main() {
	one = !one;
	int n; scanf("%d", &n);
	if (n == one)puts("NO");
	else puts(ok(n) ? "YES" : "NO");
}