9090999 has 12 divisors (see below), whose sum is σ = 13214136. Its totient is φ = 6022512.

The previous prime is 9090989. The next prime is 9091009. The reversal of 9090999 is 9990909.

It is an interprime number because it is at equal distance from previous prime (9090989) and next prime (9091009).

It is not a de Polignac number, because 9090999 - 2⁷ = 9090871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090919) 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, 1632 + ... + 4565.

It is an arithmetic number, because the mean of its divisors is an integer number (1101178).

Almost surely, 2^9090999 is an apocalyptic number.

9090999 is a deficient number, since it is larger than the sum of its proper divisors (4123137).

9090999 is a wasteful number, since it uses less digits than its factorization.

9090999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6366 (or 6363 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 45.

The square root of 9090999 is about 3015.1283554768. The cubic root of 9090999 is about 208.7070902755.

The spelling of 9090999 in words is "nine million, ninety thousand, nine hundred ninety-nine".