3019

3019 is a prime number. Its reversal, 9103, is also a prime.

The sum of the digits of 3019 (and 9103) is 13, and 13 and its reversal, 31, are both primes (A178092).

3019 is the smallest positive number that can be written as the sum of distinct Fibonacci numbers in 50 ways (A013583).

3019 is a prime of the form 6p + 1, where p (503) is also a prime (A051644).

9103 - 3019 = 6084 = 78², a perfect square (A006567).

Source: On-Line Encyclopedia of Integer Sequences