8990009 has 4 divisors (see below), whose sum is σ = 10274304. Its totient is φ = 7705716.

The previous prime is 8989999. The next prime is 8990011. The reversal of 8990009 is 9000998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8990009 - 2¹² = 8985913 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 (8990039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642137 + ... + 642150.

It is an arithmetic number, because the mean of its divisors is an integer number (2568576).

Almost surely, 2^8990009 is an apocalyptic number.

It is an amenable number.

8990009 is a deficient number, since it is larger than the sum of its proper divisors (1284295).

8990009 is a wasteful number, since it uses less digits than its factorization.

8990009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284294.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 8990009 is about 2998.3343709466. The cubic root of 8990009 is about 207.9313830001.

The spelling of 8990009 in words is "eight million, nine hundred ninety thousand, nine".