2701
This number is a composite.
A semi-prime whose prime factors are reversals of one another. [Carlton]
The product of emirps 2701 = 37 * 73 is the smallest number
n which divides the average of the nth prime (24317), its
predecessor prime, and its successor prime. (24281 + 24317
+ 24329)/3 = 24309 = 3^2 * 37 * 73. Alternate wording: 2701
is the smallest number n which divides the average of the
nth prime and the two primes surrounding it. [Post]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell