86559891 has 24 divisors (see below), whose sum is σ = 127392720. Its totient is φ = 52240320.

The previous prime is 86559883. The next prime is 86559901. The reversal of 86559891 is 19895568.

It is not a de Polignac number, because 86559891 - 2³ = 86559883 is a prime.

It is a super-2 number, since 2×86559891² = 14985229459863762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86559821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140901 + ... + 141513.

It is an arithmetic number, because the mean of its divisors is an integer number (5308030).

Almost surely, 2^86559891 is an apocalyptic number.

86559891 is a deficient number, since it is larger than the sum of its proper divisors (40832829).

86559891 is a wasteful number, since it uses less digits than its factorization.

86559891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1016 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The square root of 86559891 is about 9303.7568218435. The cubic root of 86559891 is about 442.3563171026.

The spelling of 86559891 in words is "eighty-six million, five hundred fifty-nine thousand, eight hundred ninety-one".