86987871 has 16 divisors (see below), whose sum is σ = 135654400. Its totient is φ = 54939384.

The previous prime is 86987843. The next prime is 86987899. The reversal of 86987871 is 17878968.

It is an interprime number because it is at equal distance from previous prime (86987843) and next prime (86987899).

It is not a de Polignac number, because 86987871 - 2⁷ = 86987743 is a prime.

It is a super-2 number, since 2×86987871² = 15133779402225282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86987801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84271 + ... + 85296.

It is an arithmetic number, because the mean of its divisors is an integer number (8478400).

Almost surely, 2^86987871 is an apocalyptic number.

86987871 is a deficient number, since it is larger than the sum of its proper divisors (48666529).

86987871 is a wasteful number, since it uses less digits than its factorization.

86987871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169595 (or 169589 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 86987871 is about 9326.7288477794. The cubic root of 86987871 is about 443.0841695738.

The spelling of 86987871 in words is "eighty-six million, nine hundred eighty-seven thousand, eight hundred seventy-one".