One of my coworkers used to talk about Ramanujan. He remarked Ramanujan called every prime number a close personal friend. He sort of had this deep relationship with numbers.<p>Then I saw a documentary on people who could do complex math without the aide of a calculator (e.g. given any large number and tell if it was prime in their head). I thought there might be a parallel between people like this and Ramanujan. The documentary focused on a couple of people who were not savants, but by all accounts normal people. They followed a young British kid. He described how he saw and felt about numbers, and each number had a distinct personality. I found it remarkably similar to the description about how Ramanujan felt about numbers.