require 'prime'

def pn_div(n, pn_from = nil)
  pns = Prime.each(Math.sqrt(n).to_i).to_a
  pns.select!{|pn| pn >= pn_from} if pn_from
  pns.each do |pn|
    q, r = n.divmod(pn)
    return pn, q if r == 0
  end
  return nil
end


N = gets.to_i
n1, n2 = pn_div(N)
n1, n2 = pn_div(n2, n1) if n1
puts n1 ? "YES" : "NO"