99999000989 has 8 divisors (see below), whose sum is σ = 100534609920. Its totient is φ = 99463518000.

The previous prime is 99999000979. The next prime is 99999001007. The reversal of 99999000989 is 98900099999.

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 99999000989 - 2²⁴ = 99982223773 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 (99999000929) 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, 1864652 + ... + 1917530.

It is an arithmetic number, because the mean of its divisors is an integer number (12566826240).

Almost surely, 2^99999000989 is an apocalyptic number.

It is an amenable number.

99999000989 is a deficient number, since it is larger than the sum of its proper divisors (535608931).

99999000989 is a wasteful number, since it uses less digits than its factorization.

99999000989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62971.

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

The spelling of 99999000989 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred eighty-nine", and thus it is an aban number.