9090001881 has 12 divisors (see below), whose sum is σ = 13902356052. Its totient is φ = 5703530496.

The previous prime is 9090001873. The next prime is 9090001901. The reversal of 9090001881 is 1881000909.

It can be written as a sum of positive squares in 2 ways, for example, as 7248819600 + 1841182281 = 85140^2 + 42909^2 .

It is not a de Polignac number, because 9090001881 - 2³ = 9090001873 is a prime.

It is a super-2 number, since 2×9090001881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9090001871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29705736 + ... + 29706041.

It is an arithmetic number, because the mean of its divisors is an integer number (1158529671).

Almost surely, 2^9090001881 is an apocalyptic number.

It is an amenable number.

9090001881 is a deficient number, since it is larger than the sum of its proper divisors (4812354171).

9090001881 is a wasteful number, since it uses less digits than its factorization.

9090001881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59411800 (or 59411797 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 9090001881 is about 95341.5013569642. The cubic root of 9090001881 is about 2086.9945952578.

The spelling of 9090001881 in words is "nine billion, ninety million, one thousand, eight hundred eighty-one".