86500809 has 6 divisors (see below), whose sum is σ = 124945626. Its totient is φ = 57667200.

The previous prime is 86500793. The next prime is 86500829. The reversal of 86500809 is 90800568.

It can be written as a sum of positive squares in only one way, i.e., 46621584 + 39879225 = 6828^2 + 6315^2 .

It is not a de Polignac number, because 86500809 - 2⁴ = 86500793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86500829) 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, 4805592 + ... + 4805609.

It is an arithmetic number, because the mean of its divisors is an integer number (20824271).

Almost surely, 2^86500809 is an apocalyptic number.

It is an amenable number.

86500809 is a deficient number, since it is larger than the sum of its proper divisors (38444817).

86500809 is a wasteful number, since it uses less digits than its factorization.

86500809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9611207 (or 9611204 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 86500809 is about 9300.5811108769. The cubic root of 86500809 is about 442.2556498299.

The spelling of 86500809 in words is "eighty-six million, five hundred thousand, eight hundred nine".