899040999 has 4 divisors (see below), whose sum is σ = 1198721336. Its totient is φ = 599360664.

The previous prime is 899040983. The next prime is 899041009. The reversal of 899040999 is 999040998.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 899040999 - 2⁴ = 899040983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899040949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149840164 + ... + 149840169.

It is an arithmetic number, because the mean of its divisors is an integer number (299680334).

Almost surely, 2^899040999 is an apocalyptic number.

899040999 is a deficient number, since it is larger than the sum of its proper divisors (299680337).

899040999 is a wasteful number, since it uses less digits than its factorization.

899040999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299680336.

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 899040999 is about 29984.0123899387. The cubic root of 899040999 is about 965.1463348470.

Subtracting 899040999 from its reverse (999040998), we obtain a palindrome (99999999).

The spelling of 899040999 in words is "eight hundred ninety-nine million, forty thousand, nine hundred ninety-nine".