631477 has 16 divisors (see below), whose sum is σ = 806400. Its totient is φ = 480240.

The previous prime is 631471. The next prime is 631483. The reversal of 631477 is 774136.

631477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631471) and next prime (631483).

It is a cyclic number.

It is not a de Polignac number, because 631477 - 2³ = 631469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4474 + ... + 4612.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁶³¹⁴⁷⁷ is an apocalyptic number.

631477 is the 649-th pentagonal number.

It is an amenable number.

631477 is a deficient number, since it is larger than the sum of its proper divisors (174923).

631477 is a wasteful number, since it uses less digits than its factorization.

631477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its digits is 3528, while the sum is 28.

The square root of 631477 is about 794.6552711711. The cubic root of 631477 is about 85.7931299661.

It can be divided in two parts, 63 and 1477, that added together give a triangular number (1540 = T₅₅).

The spelling of 631477 in words is "six hundred thirty-one thousand, four hundred seventy-seven".