631632005 has 8 divisors (see below), whose sum is σ = 772259832. Its totient is φ = 495771328.

The previous prime is 631631971. The next prime is 631632017. The reversal of 631632005 is 500236136.

It can be written as a sum of positive squares in 4 ways, for example, as 304781764 + 326850241 = 17458^2 + 18079^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631632005 - 2¹⁶ = 631566469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1191494 + ... + 1192023.

It is an arithmetic number, because the mean of its divisors is an integer number (96532479).

Almost surely, 2^631632005 is an apocalyptic number.

It is an amenable number.

631632005 is a deficient number, since it is larger than the sum of its proper divisors (140627827).

631632005 is a wasteful number, since it uses less digits than its factorization.

631632005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383575.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 631632005 is about 25132.2900866594. The cubic root of 631632005 is about 858.0014910601.

The spelling of 631632005 in words is "six hundred thirty-one million, six hundred thirty-two thousand, five".