999000899 has 16 divisors (see below), whose sum is σ = 1099768320. Its totient is φ = 901873440.

The previous prime is 999000841. The next prime is 999000901. The reversal of 999000899 is 998000999.

It is a happy number.

It is not a de Polignac number, because 999000899 - 2⁸ = 999000643 is a prime.

It is a super-3 number, since 3×999000899³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999000899.

It is not an unprimeable number, because it can be changed into a prime (999000809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105344 + ... + 114434.

It is an arithmetic number, because the mean of its divisors is an integer number (68735520).

Almost surely, 2^999000899 is an apocalyptic number.

999000899 is a deficient number, since it is larger than the sum of its proper divisors (100767421).

999000899 is a wasteful number, since it uses less digits than its factorization.

999000899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290.

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

The square root of 999000899 is about 31606.9754801057. The cubic root of 999000899 is about 999.6668553603. Note that the first 3 decimals are identical.

The spelling of 999000899 in words is "nine hundred ninety-nine million, eight hundred ninety-nine", and thus it is an aban number.