87057831 has 8 divisors (see below), whose sum is σ = 132659584. Its totient is φ = 49747320.

The previous prime is 87057823. The next prime is 87057847. The reversal of 87057831 is 13875078.

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

It is not a de Polignac number, because 87057831 - 2³ = 87057823 is a prime.

It is a super-2 number, since 2×87057831² = 15158131876849122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87057831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87057821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2072785 + ... + 2072826.

It is an arithmetic number, because the mean of its divisors is an integer number (16582448).

Almost surely, 2^87057831 is an apocalyptic number.

87057831 is a deficient number, since it is larger than the sum of its proper divisors (45601753).

87057831 is a wasteful number, since it uses less digits than its factorization.

87057831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145621.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 87057831 is about 9330.4786050877. The cubic root of 87057831 is about 443.2029212334.

The spelling of 87057831 in words is "eighty-seven million, fifty-seven thousand, eight hundred thirty-one".