1831

This number is a prime.

James A. Garfield is the only President of the United States to be born on a prime date, i.e., month, day, and year are primes (November 19, 1831). [Blanchette]

The year mathematician Sophie Germain died in Paris, France. [Dennis]

The smallest of all four-digit primes whose sum of digits is equal to the absolute difference between the first and last pairs of digits. [Goins]

The first pair of successive primes differing by 16, i.e., (1831, 1847), are also emirps. [Loungrides]