831664887 has 8 divisors (see below), whose sum is σ = 1109230080. Its totient is φ = 554271480.

The previous prime is 831664783. The next prime is 831664891. The reversal of 831664887 is 788466138.

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

It is not a de Polignac number, because 831664887 - 2⁷ = 831664759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831664087) 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, 31189 + ... + 51342.

It is an arithmetic number, because the mean of its divisors is an integer number (138653760).

Almost surely, 2^831664887 is an apocalyptic number.

831664887 is a deficient number, since it is larger than the sum of its proper divisors (277565193).

831664887 is a wasteful number, since it uses less digits than its factorization.

831664887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85893.

The product of its digits is 1548288, while the sum is 51.

The square root of 831664887 is about 28838.6006421948. The cubic root of 831664887 is about 940.4075820375.

The spelling of 831664887 in words is "eight hundred thirty-one million, six hundred sixty-four thousand, eight hundred eighty-seven".