program main
  implicit none
  integer*8::N,i,j
  integer*8::upper
  integer*8,allocatable::isPrime(:)
  read *,N
  if(N.eq.1) then
     print '(a)', "NO"
     return
  end if

  allocate(isPrime(N))
  isPrime = 1
  upper = FLOOR(SQRT(REAL(N)))

  do i=2, FLOOR(SQRT(REAL(N)))
     if(isPrime(i).eq.1) then
        if(MOD(N,i).eq.0) then
           print '(a)', "YES"
           return
        end if
        do j=i+i, N, i
           isPrime(j) = 0
        end do
     end if
  end do

  print '(a)', "NO"
end program main