90900000909 has 24 divisors (see below), whose sum is σ = 140400025272. Its totient is φ = 56470579200.

The previous prime is 90900000869. The next prime is 90900001019.

90900000909 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 62802866025 + 28097134884 = 250605^2 + 167622^2 .

It is not a de Polignac number, because 90900000909 - 2³³ = 82310066317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90900000109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2925724 + ... + 2956629.

It is an arithmetic number, because the mean of its divisors is an integer number (5850001053).

Almost surely, 2^90900000909 is an apocalyptic number.

It is an amenable number.

90900000909 is a deficient number, since it is larger than the sum of its proper divisors (49500024363).

90900000909 is a wasteful number, since it uses less digits than its factorization.

90900000909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882477 (or 5882474 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

It can be divided in two parts, 90900000 and 909, that added together give a palindrome (90900909).

The spelling of 90900000909 in words is "ninety billion, nine hundred million, nine hundred nine", and thus it is an aban number.