86695809 has 16 divisors (see below), whose sum is σ = 124514304. Its totient is φ = 53499600.

The previous prime is 86695781. The next prime is 86695813. The reversal of 86695809 is 90859668.

It is not a de Polignac number, because 86695809 - 2⁷ = 86695681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86691809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18127 + ... + 22404.

It is an arithmetic number, because the mean of its divisors is an integer number (7782144).

Almost surely, 2^86695809 is an apocalyptic number.

It is an amenable number.

86695809 is a deficient number, since it is larger than the sum of its proper divisors (37818495).

86695809 is a wasteful number, since it uses less digits than its factorization.

86695809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40588.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 86695809 is about 9311.0584253349. The cubic root of 86695809 is about 442.5877281455.

The spelling of 86695809 in words is "eighty-six million, six hundred ninety-five thousand, eight hundred nine".