char comment[] = "Yukicoder No Three zero two three. by Bal for u";

#include <stdio.h>
#include <math.h>

int zero, one, two, three;
int true, false;

int add(int a, int b) {
	int c;
    while (b != zero) c = (a & b) << one, a ^= b, b = c;
    return a;
}

int check(int n) {
	int a, b;
	if (n == one) return false;
	if (n == two) return true;
	if (n % two == zero) return false;
	b = (int)sqrt((double)n);
	a = three; while (a <= b) {
		if (n % a == zero) return false;
		a = add(a, two);
	}
	return true;
}

int main()
{
	int N;
	false = zero, true = one = !zero;
	two = one << one, three = two | one;
	scanf("%d", &N);
	puts(check(N)? "YES": "NO");
	return zero;
}