631705473 has 28 divisors (see below), whose sum is σ = 1082437248. Its totient is φ = 360971640.

The previous prime is 631705469. The next prime is 631705523. The reversal of 631705473 is 374507136.

It is not a de Polignac number, because 631705473 - 2² = 631705469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631705453) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 56793 + ... + 66998.

Almost surely, 2^631705473 is an apocalyptic number.

631705473 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

631705473 is a deficient number, since it is larger than the sum of its proper divisors (450731775).

631705473 is an equidigital number, since it uses as much as digits as its factorization.

631705473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123816 (or 123801 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 631705473 is about 25133.7516698164. The cubic root of 631705473 is about 858.0347557929.

The spelling of 631705473 in words is "six hundred thirty-one million, seven hundred five thousand, four hundred seventy-three".