9009091 has 12 divisors (see below), whose sum is σ = 11286912. Its totient is φ = 7127568.

The previous prime is 9009083. The next prime is 9009103. The reversal of 9009091 is 1909009.

It is not a de Polignac number, because 9009091 - 2³ = 9009083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9009041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6435 + ... + 7708.

It is an arithmetic number, because the mean of its divisors is an integer number (940576).

Almost surely, 2^9009091 is an apocalyptic number.

9009091 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9009091 is a deficient number, since it is larger than the sum of its proper divisors (2277821).

9009091 is a wasteful number, since it uses less digits than its factorization.

9009091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14170 (or 14163 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 9009091 is about 3001.5147842381. The cubic root of 9009091 is about 208.0783959294.

The spelling of 9009091 in words is "nine million, nine thousand, ninety-one".