8999091 has 12 divisors (see below), whose sum is σ = 13045032. Its totient is φ = 5978016.

The previous prime is 8999087. The next prime is 8999099. The reversal of 8999091 is 1909998.

It is not a de Polignac number, because 8999091 - 2² = 8999087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8999099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1135 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (1087086).

Almost surely, 2^8999091 is an apocalyptic number.

8999091 is a deficient number, since it is larger than the sum of its proper divisors (4045941).

8999091 is a wasteful number, since it uses less digits than its factorization.

8999091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The square root of 8999091 is about 2999.8484961744. The cubic root of 8999091 is about 208.0013791205.

The spelling of 8999091 in words is "eight million, nine hundred ninety-nine thousand, ninety-one".