9090009 has 8 divisors (see below), whose sum is σ = 13466720. Its totient is φ = 6059988.

The previous prime is 9090007. The next prime is 9090013. The reversal of 9090009 is 9000909.

It is not a de Polignac number, because 9090009 - 2¹ = 9090007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 336667 = 9090009 / (9 + 0 + 9 + 0 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9090007) 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 7 ways as a sum of consecutive naturals, for example, 168307 + ... + 168360.

It is an arithmetic number, because the mean of its divisors is an integer number (1683340).

Almost surely, 2^9090009 is an apocalyptic number.

It is an amenable number.

9090009 is a deficient number, since it is larger than the sum of its proper divisors (4376711).

9090009 is a wasteful number, since it uses less digits than its factorization.

9090009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336676 (or 336670 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 9090009 is about 3014.9641788917. The cubic root of 9090009 is about 208.6995140080.

The spelling of 9090009 in words is "nine million, ninety thousand, nine".