90999099908 has 12 divisors (see below), whose sum is σ = 159914737920. Its totient is φ = 45309174792.

The previous prime is 90999099899. The next prime is 90999099929. The reversal of 90999099908 is 80999099909.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47592716 + ... + 47594627.

It is an arithmetic number, because the mean of its divisors is an integer number (13326228160).

Almost surely, 2^90999099908 is an apocalyptic number.

It is an amenable number.

90999099908 is a deficient number, since it is larger than the sum of its proper divisors (68915638012).

90999099908 is a wasteful number, since it uses less digits than its factorization.

90999099908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95187586 (or 95187584 counting only the distinct ones).

The product of its (nonzero) digits is 38263752, while the sum is 71.

Subtracting from 90999099908 its reverse (80999099909), we obtain a palindrome (9999999999).

The spelling of 90999099908 in words is "ninety billion, nine hundred ninety-nine million, ninety-nine thousand, nine hundred eight".