17. If the digits of a positive integer $N$ are reversed and it remains the same, then $N$ is called a palindrome. The year 1991 is the only year in this century with the following two properties:
(a) It is a palindrome;
(b) It can be factored into the product of a two-digit prime palindrome and a three-digit prime palindrome.

How many years between 1000 and 2000 have both properties (a) and (b)? ( ).
(A)1. (B)2. (C)3. (D) 4. (E) 5.
$\mathrm{D}$