9085388881 has 2 divisors, whose sum is σ = 9085388882. Its totient is φ = 9085388880.

The previous prime is 9085388849. The next prime is 9085388899. The reversal of 9085388881 is 1888835809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7794064656 + 1291324225 = 88284^2 + 35935^2 .

It is a cyclic number.

It is not a de Polignac number, because 9085388881 - 2⁵ = 9085388849 is a prime.

It is a super-2 number, since 2×9085388881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9085388281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4542694440 + 4542694441.

It is an arithmetic number, because the mean of its divisors is an integer number (4542694441).

Almost surely, 2^9085388881 is an apocalyptic number.

It is an amenable number.

9085388881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9085388881 is an equidigital number, since it uses as much as digits as its factorization.

9085388881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4423680, while the sum is 58.

The square root of 9085388881 is about 95317.3063037348. The cubic root of 9085388881 is about 2086.6414990681.

The spelling of 9085388881 in words is "nine billion, eighty-five million, three hundred eighty-eight thousand, eight hundred eighty-one".