90900900908 has 6 divisors (see below), whose sum is σ = 159076576596. Its totient is φ = 45450450452.

The previous prime is 90900900899. The next prime is 90900900913. The reversal of 90900900908 is 80900900909.

It is a super-3 number, since 3×90900900908³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11362612610 + ... + 11362612617.

It is an arithmetic number, because the mean of its divisors is an integer number (26512762766).

Almost surely, 2^90900900908 is an apocalyptic number.

It is an amenable number.

90900900908 is a deficient number, since it is larger than the sum of its proper divisors (68175675688).

90900900908 is a wasteful number, since it uses less digits than its factorization.

90900900908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22725225231 (or 22725225229 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

Subtracting from 90900900908 its reverse (80900900909), we obtain a palindrome (9999999999).

The spelling of 90900900908 in words is "ninety billion, nine hundred million, nine hundred thousand, nine hundred eight".