Reason for 5381 number in DJB hash function?

Question

Can anyone tell me why the number 5381 is used in DJB hash function ?

DJB Hash function is

h(0) = 5381

h(i) = 33 * h(i-1) ^ str[i]

A c progra

Answer 1

5381 is just a number that, in testing, resulted in fewer collisions and better avalanching. You'll find "magic constants" in just about every hash algo.