86475891 has 4 divisors (see below), whose sum is σ = 115301192. Its totient is φ = 57650592.

The previous prime is 86475869. The next prime is 86475937. The reversal of 86475891 is 19857468.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 86475891 - 2¹⁰ = 86474867 is a prime.

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 86475891.

It is not an unprimeable number, because it can be changed into a prime (86475391) 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 3 ways as a sum of consecutive naturals, for example, 14412646 + ... + 14412651.

It is an arithmetic number, because the mean of its divisors is an integer number (28825298).

Almost surely, 2^86475891 is an apocalyptic number.

86475891 is a deficient number, since it is larger than the sum of its proper divisors (28825301).

86475891 is a wasteful number, since it uses less digits than its factorization.

86475891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28825300.

The product of its digits is 483840, while the sum is 48.

The square root of 86475891 is about 9299.2414206751. The cubic root of 86475891 is about 442.2131793808.

The spelling of 86475891 in words is "eighty-six million, four hundred seventy-five thousand, eight hundred ninety-one".