99900900999 has 12 divisors (see below), whose sum is σ = 144307615816. Its totient is φ = 66597686352.

The previous prime is 99900900997. The next prime is 99900901003.

99900900999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99900900999 - 2¹ = 99900900997 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 (99900900997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14452 + ... + 447225.

Almost surely, 2^99900900999 is an apocalyptic number.

99900900999 is a deficient number, since it is larger than the sum of its proper divisors (44406714817).

99900900999 is a wasteful number, since it uses less digits than its factorization.

99900900999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485726 (or 485723 counting only the distinct ones).

The product of its (nonzero) digits is 4782969, while the sum is 63.

The spelling of 99900900999 in words is "ninety-nine billion, nine hundred million, nine hundred thousand, nine hundred ninety-nine".