90008009 has 8 divisors (see below), whose sum is σ = 110779200. Its totient is φ = 71215056.

The previous prime is 90007937. The next prime is 90008021. The reversal of 90008009 is 90080009.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90008009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90008209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494459 + ... + 494640.

It is an arithmetic number, because the mean of its divisors is an integer number (13847400).

Almost surely, 2^90008009 is an apocalyptic number.

It is an amenable number.

90008009 is a deficient number, since it is larger than the sum of its proper divisors (20771191).

90008009 is a wasteful number, since it uses less digits than its factorization.

90008009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989119.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90008009 is about 9487.2550824778. The cubic root of 90008009 is about 448.1537674357.

The spelling of 90008009 in words is "ninety million, eight thousand, nine".