90999908 has 12 divisors (see below), whose sum is σ = 159558000. Its totient is φ = 45411912.

The previous prime is 90999899. The next prime is 90999947. The reversal of 90999908 is 80999909.

It is a happy number.

It is a super-3 number, since 3×90999908³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90999908.

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, 19658 + ... + 23841.

It is an arithmetic number, because the mean of its divisors is an integer number (13296500).

Almost surely, 2^90999908 is an apocalyptic number.

It is an amenable number.

90999908 is a deficient number, since it is larger than the sum of its proper divisors (68558092).

90999908 is a wasteful number, since it uses less digits than its factorization.

90999908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44026 (or 44024 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 90999908 is about 9539.3871920580. The cubic root of 90999908 is about 449.7939929485.

Subtracting from 90999908 its reverse (80999909), we obtain a palindrome (9999999).

The spelling of 90999908 in words is "ninety million, nine hundred ninety-nine thousand, nine hundred eight".