631672605 has 24 divisors (see below), whose sum is σ = 1107208440. Its totient is φ = 333104640.

The previous prime is 631672597. The next prime is 631672607. The reversal of 631672605 is 506276136.

It can be written as a sum of positive squares in 4 ways, for example, as 72539289 + 559133316 = 8517^2 + 23646^2 .

It is not a de Polignac number, because 631672605 - 2³ = 631672597 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 631672605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631672607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74856 + ... + 82865.

It is an arithmetic number, because the mean of its divisors is an integer number (46133685).

Almost surely, 2^631672605 is an apocalyptic number.

It is an amenable number.

631672605 is a deficient number, since it is larger than the sum of its proper divisors (475535835).

631672605 is a wasteful number, since it uses less digits than its factorization.

631672605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157821 (or 157818 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 631672605 is about 25133.0977995153. The cubic root of 631672605 is about 858.0198741871.

The spelling of 631672605 in words is "six hundred thirty-one million, six hundred seventy-two thousand, six hundred five".