999838999 has 8 divisors (see below), whose sum is σ = 1012585392. Its totient is φ = 987109440.

The previous prime is 999838963. The next prime is 999839017.

It is a happy number.

999838999 is nontrivially palindromic in base 10.

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 999838999 - 2¹⁷ = 999707927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999838699) 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, 151227 + ... + 157699.

It is an arithmetic number, because the mean of its divisors is an integer number (126573174).

Almost surely, 2^999838999 is an apocalyptic number.

999838999 is a deficient number, since it is larger than the sum of its proper divisors (12746393).

999838999 is a wasteful number, since it uses less digits than its factorization.

999838999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417.

The product of its digits is 102036672, while the sum is 73.

The square root of 999838999 is about 31620.2308498847. The cubic root of 999838999 is about 999.9463301196.

The spelling of 999838999 in words is "nine hundred ninety-nine million, eight hundred thirty-eight thousand, nine hundred ninety-nine".