89990000009999 has 16 divisors (see below), whose sum is σ = 93021180487680. Its totient is φ = 86966861280480.

The previous prime is 89990000009989. The next prime is 89990000010007. The reversal of 89990000009999 is 99990000009998.

It is a cyclic number.

It is not a de Polignac number, because 89990000009999 - 2³² = 89985705042703 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 (89990000009989) 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, 226522862 + ... + 226919780.

It is an arithmetic number, because the mean of its divisors is an integer number (5813823780480).

Almost surely, 2^{89990000009999} is an apocalyptic number.

89990000009999 is a deficient number, since it is larger than the sum of its proper divisors (3031180477681).

89990000009999 is a wasteful number, since it uses less digits than its factorization.

89990000009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407030.

The product of its (nonzero) digits is 38263752, while the sum is 71.

Subtracting 89990000009999 from its reverse (99990000009998), we obtain a palindrome (9999999999999).

The spelling of 89990000009999 in words is "eighty-nine trillion, nine hundred ninety billion, nine thousand, nine hundred ninety-nine".