fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: usize = n.trim().parse().unwrap();

    let mut result: Vec<usize> = vec![];
    let lim = (n as f64).sqrt() as usize;
    for i in 2..=lim {
        while n % i == 0 {
            result.push(i);
            n /= i;
        }
        if result.len() > 1 {
            println!("YES");
            return;
        }
    }
    println!("NO");
}