870087831 has 16 divisors (see below), whose sum is σ = 1175217888. Its totient is φ = 572544000.

The previous prime is 870087817. The next prime is 870087833. The reversal of 870087831 is 138780078.

It is not a de Polignac number, because 870087831 - 2¹⁹ = 869563543 is a prime.

It is a super-2 number, since 2×870087831² = 1514105667308569122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870087833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97851 + ... + 106371.

It is an arithmetic number, because the mean of its divisors is an integer number (73451118).

Almost surely, 2^870087831 is an apocalyptic number.

870087831 is a deficient number, since it is larger than the sum of its proper divisors (305130057).

870087831 is a wasteful number, since it uses less digits than its factorization.

870087831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8962.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 870087831 is about 29497.2512448194. The cubic root of 870087831 is about 954.6723951460.

The spelling of 870087831 in words is "eight hundred seventy million, eighty-seven thousand, eight hundred thirty-one".