Prime anagrams

[zak seidov]

Take five (decimal) digit prime number. 
Check all anagrams for primarity, 
and count the prime numbers.

E.g. there are 39 primes with (decimal) digits
1,3,7,8,9:
13789,13879,17389,17839,18379,18397,18793,18973,19387,37189,38197,38791,38917,38971,71389,71983,73189,73819,78139,78193,79813,81937,81973,83719,83791,87931,89137,89317,89371,91387,91837,91873,93187,93871,97381,97813,98317,98713,98731
(not(?) in OEIS).

The number 39 is maximal(?) for 5d prime anagrams.

What about other cases?
Thanks, Zak

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