This number is a prime.
The sum of the letters of "nine hundred and seventy-seven" is an adjacent prime to 977 if we use the alphaprime code. It is left for the prime curiologist to find if the adjacent prime occurs before or after 977. [Hunnell]
In the movie Harvey, Dr. Sanderson prescribes "Formula 977" to Elwood P. Dowd (James Stewart). [La Haye]
The first prime that results in a cube number if added to the sum of its digits. [Bopardikar]
Episode 977 of the Vietnam Veteran News provided a sneak preview of the colossal documentary 'The Vietnam War' directed by Ken Burns and Lynn Novick. Curiously, Vietnam was divided in two in 1954. Note that 1954 divided by two is 977. [Russell]