90009099 has 24 divisors (see below), whose sum is σ = 139115600. Its totient is φ = 55909440.

The previous prime is 90009053. The next prime is 90009119. The reversal of 90009099 is 99090009.

It is not a de Polignac number, because 90009099 - 2²⁵ = 56454667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90009299) 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, 6117 + ... + 14745.

Almost surely, 2^90009099 is an apocalyptic number.

90009099 is a deficient number, since it is larger than the sum of its proper divisors (49106501).

90009099 is a wasteful number, since it uses less digits than its factorization.

90009099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8715 (or 8712 counting only the distinct ones).

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

The square root of 90009099 is about 9487.3125277921. The cubic root of 90009099 is about 448.1555764808.

The spelling of 90009099 in words is "ninety million, nine thousand, ninety-nine".