86143887 has 6 divisors (see below), whose sum is σ = 124430072. Its totient is φ = 57429252.

The previous prime is 86143847. The next prime is 86143907. The reversal of 86143887 is 78834168.

It is not a de Polignac number, because 86143887 - 2¹⁰ = 86142863 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 (86143817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4785763 + ... + 4785780.

Almost surely, 2^86143887 is an apocalyptic number.

86143887 is a deficient number, since it is larger than the sum of its proper divisors (38286185).

86143887 is a wasteful number, since it uses less digits than its factorization.

86143887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9571549 (or 9571546 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 86143887 is about 9281.3731203955. The cubic root of 86143887 is about 441.6465288235.

The spelling of 86143887 in words is "eighty-six million, one hundred forty-three thousand, eight hundred eighty-seven".