86609805 has 16 divisors (see below), whose sum is σ = 143354880. Its totient is φ = 44598848.

The previous prime is 86609797. The next prime is 86609837. The reversal of 86609805 is 50890668.

It is a cyclic number.

It is not a de Polignac number, because 86609805 - 2³ = 86609797 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99117 + ... + 99986.

It is an arithmetic number, because the mean of its divisors is an integer number (8959680).

Almost surely, 2^86609805 is an apocalyptic number.

It is an amenable number.

86609805 is a deficient number, since it is larger than the sum of its proper divisors (56745075).

86609805 is a wasteful number, since it uses less digits than its factorization.

86609805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199140.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 86609805 is about 9306.4389000305. The cubic root of 86609805 is about 442.4413277247.

The spelling of 86609805 in words is "eighty-six million, six hundred nine thousand, eight hundred five".