789

789 = 3 x 263.

789 is the sum of three consecutive primes: 257 + 263 + 269 = 789.

789 are the first three digits of 9⁷⁸⁹.

789 occurs in the sequence generated by starting with 1, then repeatedly reversing the digits and adding 2: 1, 3, 5, 7, 9, 11, 13, 33, . . . , 787, 789, 989, . . .


In the Year 789, Charlemagne introduced the royal foot as the unit of length.

Source: What’s Special About This Number?