631906473 has 64 divisors (see below), whose sum is σ = 1011999744. Its totient is φ = 346368000.

The previous prime is 631906453. The next prime is 631906477. The reversal of 631906473 is 374609136.

It is not a de Polignac number, because 631906473 - 2⁸ = 631906217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631906477) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1908918 + ... + 1909248.

It is an arithmetic number, because the mean of its divisors is an integer number (15812496).

Almost surely, 2^631906473 is an apocalyptic number.

It is an amenable number.

631906473 is a deficient number, since it is larger than the sum of its proper divisors (380093271).

631906473 is a wasteful number, since it uses less digits than its factorization.

631906473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 631906473 is about 25137.7499589760. The cubic root of 631906473 is about 858.1257510983.

The spelling of 631906473 in words is "six hundred thirty-one million, nine hundred six thousand, four hundred seventy-three".