fn has_two_divisor(n: i64) -> bool {
	let mut c = 0;
	let mut m = n;
	if m == 1 || m == 2 {
		return false
	} else {
		let mut i = 2;
		while m >= i * i {
			if m % i == 0 {
				c += 1;
				m /= i;
				continue;
			}
			i += 1;
		}
		if c >= 2 { return true; }
	}
	false
}

fn main() {
	let mut n = String::new();
	std::io::stdin().read_line(&mut n).ok();
	let n: i64 = n.trim().parse().unwrap();
	if has_two_divisor(n){ println!("YES"); }
	else { println!("NO"); }
}