1889

1889 is a prime number. It is a Sophie Germain prime because 2 x 1889 + 1= 3779 is also prime (A005384).

1889 is the smallest prime such that it and the next four primes (1889, 1901, 1907, 1913, and 1931) are all 5(mod 6), that is, leave a remainder of 5 when divided by 6.

1889 is the smallest prime with digit sum 26 (A067180).

1889 and 118891 are both primes (A069687).

1889 has a representation as a sum of two squares: 1889 = 17² + 40².

1889 is the hypotenuse of a primitive Pythagorean triple: 1889² = 1311² + 1360².

1889 is a divisor of 85⁸ - 1.

The Wall Street Journal was first published in the year 1889.

Source: Prime Curios!