The best number is 73, according to Dr. Sheldon Cooper. Not only is it a prime number, but it is also the reverse of a prime number (37), and a palindrome in base 2: 1001001.
No. 73 is also the number of Dendrophilia, the latest of Madam Jillinghoff's Bedroom Rhymes. This one came to me while I was reading the poem "The Three Ladies" by Robert Creeley. The first line is taken word for word from Creeley. Odd how these things happen.