86681885 has 4 divisors (see below), whose sum is σ = 104018268. Its totient is φ = 69345504.

The previous prime is 86681873. The next prime is 86681891. The reversal of 86681885 is 58818668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12773476 + 73908409 = 3574^2 + 8597^2 .

It is a cyclic number.

It is not a de Polignac number, because 86681885 - 2⁴ = 86681869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8668184 + ... + 8668193.

It is an arithmetic number, because the mean of its divisors is an integer number (26004567).

Almost surely, 2^86681885 is an apocalyptic number.

It is an amenable number.

86681885 is a deficient number, since it is larger than the sum of its proper divisors (17336383).

86681885 is a wasteful number, since it uses less digits than its factorization.

86681885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17336382.

The product of its digits is 737280, while the sum is 50.

The square root of 86681885 is about 9310.3106822490. The cubic root of 86681885 is about 442.5640325692.

The spelling of 86681885 in words is "eighty-six million, six hundred eighty-one thousand, eight hundred eighty-five".