477 = 32 x 53,
477 has a representation as a sum of two squares: 477 = 62 + 212.
477 is a pentagonal number.
477 is the smallest number that is the sum of different primes by using twice all the digits greater than 0: 477 = 89 + 83 + 67 + 61 + 53 + 47 + 41 + 29 + 5 + 2.
477 is the smallest number whose cube contains four 3s: 4773 = 108,531,333.
Source: Number Gossip