86197985 has 8 divisors (see below), whose sum is σ = 103608936. Its totient is φ = 68844160.

The previous prime is 86197967. The next prime is 86197999. The reversal of 86197985 is 58979168.

It can be written as a sum of positive squares in 4 ways, for example, as 5329 + 86192656 = 73^2 + 9284^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86197985 - 2⁸ = 86197729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10886 + ... + 17055.

It is an arithmetic number, because the mean of its divisors is an integer number (12951117).

Almost surely, 2^86197985 is an apocalyptic number.

It is an amenable number.

86197985 is a deficient number, since it is larger than the sum of its proper divisors (17410951).

86197985 is a wasteful number, since it uses less digits than its factorization.

86197985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28563.

The product of its digits is 1088640, while the sum is 53.

The square root of 86197985 is about 9284.2869947024. The cubic root of 86197985 is about 441.7389602004.

The spelling of 86197985 in words is "eighty-six million, one hundred ninety-seven thousand, nine hundred eighty-five".