631816887 has 8 divisors (see below), whose sum is σ = 907224304. Its totient is φ = 388810368.

The previous prime is 631816873. The next prime is 631816897. The reversal of 631816887 is 788618136.

631816887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-631816887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631816897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8100178 + ... + 8100255.

It is an arithmetic number, because the mean of its divisors is an integer number (113403038).

Almost surely, 2^631816887 is an apocalyptic number.

631816887 is a deficient number, since it is larger than the sum of its proper divisors (275407417).

631816887 is a wasteful number, since it uses less digits than its factorization.

631816887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16200449.

The product of its digits is 387072, while the sum is 48.

The square root of 631816887 is about 25135.9679940917. The cubic root of 631816887 is about 858.0851967388.

The spelling of 631816887 in words is "six hundred thirty-one million, eight hundred sixteen thousand, eight hundred eighty-seven".