300 (three hundred) is the natural number following 299 and preceding 301. The number 300 is a triangular number and the sum of a pair of twin primes (149 + 151), as well as the sum of ten consecutive primes (13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47). It is palindromic in 3 consecutive bases: 300 = 606 = 454 = 363, and also in bases 13, 19, 24, 29, 49 and 59. 

Three hundred is: 

301 = 7 × 43. 301 is the sum of three consecutive primes (97 + 101 + 103), happy number in base 10 

An HTTP status code, indicating the content has been moved and the change is permanent (permanent redirect). It is also the number of a debated Turkish penal code. 

302 = 2 × 151. 302 is a nontotient and a happy number 

302 is the HTTP status code indicating the content has been moved (temporary redirect). It is also the displacement in cubic inches of Ford's "5.0" V8 and the area code for the state of Delaware. 

303 = 3 × 101 

303 is the "See other" HTTP status code, indicating content can be found elsewhere. Model number of the Roland TB-303 synthesizer which is accredited as having been used to create the first acid house music tracks, in the late 1980s.
What is the number after 299?
300 (three hundred) is the natural number following 299 and preceding 301.