9990009 has 12 divisors (see below), whose sum is σ = 14527552. Its totient is φ = 6615000.

The previous prime is 9989957. The next prime is 9990017. The reversal of 9990009 is 9000999.

It is not a de Polignac number, because 9990009 - 2¹¹ = 9987961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9990089) 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, 2317 + ... + 5034.

Almost surely, 2^9990009 is an apocalyptic number.

It is an amenable number.

9990009 is a deficient number, since it is larger than the sum of its proper divisors (4537543).

9990009 is a wasteful number, since it uses less digits than its factorization.

9990009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508 (or 7505 counting only the distinct ones).

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

The square root of 9990009 is about 3160.6975495925. The cubic root of 9990009 is about 215.3716952382.

The spelling of 9990009 in words is "nine million, nine hundred ninety thousand, nine".