9998009 has 12 divisors (see below), whose sum is σ = 12243600. Its totient is φ = 8117928.

The previous prime is 9997997. The next prime is 9998017. The reversal of 9998009 is 9008999.

9998009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9998009 - 2⁸ = 9997753 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9998099) 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, 4439 + ... + 6300.

It is an arithmetic number, because the mean of its divisors is an integer number (1020300).

Almost surely, 2^9998009 is an apocalyptic number.

It is an amenable number.

9998009 is a deficient number, since it is larger than the sum of its proper divisors (2245591).

9998009 is a wasteful number, since it uses less digits than its factorization.

9998009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10772 (or 10765 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 9998009 is about 3161.9628397563. The cubic root of 9998009 is about 215.4291697893.

The spelling of 9998009 in words is "nine million, nine hundred ninety-eight thousand, nine".