86890609867 has 4 divisors (see below), whose sum is σ = 91463799880. Its totient is φ = 82317419856.

The previous prime is 86890609837. The next prime is 86890609873. The reversal of 86890609867 is 76890609868.

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

It is a cyclic number.

It is not a de Polignac number, because 86890609867 - 2⁷ = 86890609739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86890609837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286594978 + ... + 2286595015.

It is an arithmetic number, because the mean of its divisors is an integer number (22865949970).

Almost surely, 2^86890609867 is an apocalyptic number.

86890609867 is a deficient number, since it is larger than the sum of its proper divisors (4573190013).

86890609867 is a wasteful number, since it uses less digits than its factorization.

86890609867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573190012.

The product of its (nonzero) digits is 62705664, while the sum is 67.

Subtracting from 86890609867 its reverse (76890609868), we obtain a palindrome (9999999999).

The spelling of 86890609867 in words is "eighty-six billion, eight hundred ninety million, six hundred nine thousand, eight hundred sixty-seven".