86388889 has 4 divisors (see below), whose sum is σ = 86489856. Its totient is φ = 86287924.

The previous prime is 86388853. The next prime is 86388893. The reversal of 86388889 is 98888368.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86388889 - 2¹¹ = 86386841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86388389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49189 + ... + 50914.

It is an arithmetic number, because the mean of its divisors is an integer number (21622464).

Almost surely, 2^86388889 is an apocalyptic number.

It is an amenable number.

86388889 is a deficient number, since it is larger than the sum of its proper divisors (100967).

86388889 is a wasteful number, since it uses less digits than its factorization.

86388889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100966.

The product of its digits is 5308416, while the sum is 58.

The square root of 86388889 is about 9294.5623350430. The cubic root of 86388889 is about 442.0648284346.

The spelling of 86388889 in words is "eighty-six million, three hundred eighty-eight thousand, eight hundred eighty-nine".