990008999 has 8 divisors (see below), whose sum is σ = 1132118400. Its totient is φ = 848069496.

The previous prime is 990008993. The next prime is 990009017. The reversal of 990008999 is 999800099.

It is a happy number.

990008999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 990008999 - 2⁸ = 990008743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990008999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990008993) 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, 29729 + ... + 53514.

It is an arithmetic number, because the mean of its divisors is an integer number (141514800).

Almost surely, 2^990008999 is an apocalyptic number.

990008999 is a deficient number, since it is larger than the sum of its proper divisors (142109401).

990008999 is a wasteful number, since it uses less digits than its factorization.

990008999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84949.

The product of its (nonzero) digits is 472392, while the sum is 53.

The square root of 990008999 is about 31464.4084482769. The cubic root of 990008999 is about 996.6585132360.

The spelling of 990008999 in words is "nine hundred ninety million, eight thousand, nine hundred ninety-nine".