use std::io::Read;

fn is_prime(n: u64) -> bool {
    let mut m = 2;
    while m * m <= n {
        if n % m == 0 {
            return false;
        }
        m += 1;
    }
    true
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: u64 = itr.next().unwrap().parse().unwrap();

    let mut m = 2u64;
    let mut div = Vec::new();
    while m * m <= n {
        if n % m == 0 {
            div.push(m);
            if n / m != m {
                div.push(n / m);
            }
        }
        m += 1;
    }

    for a in div {
        if !is_prime(a) {
            println!("YES");
            return;
        }
    }
    println!("NO");
}