999890098999 has 32 divisors (see below), whose sum is σ = 1195172366400. Its totient is φ = 825748439040.

The previous prime is 999890098993. The next prime is 999890099009.

999890098999 is nontrivially palindromic in base 10.

999890098999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 999890098999 - 2²⁹ = 999353228087 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 (999890098993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17373679 + ... + 17431135.

It is an arithmetic number, because the mean of its divisors is an integer number (37349136450).

Almost surely, 2^999890098999 is an apocalyptic number.

999890098999 is a deficient number, since it is larger than the sum of its proper divisors (195282267401).

999890098999 is a wasteful number, since it uses less digits than its factorization.

999890098999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60723.

The product of its (nonzero) digits is 2754990144, while the sum is 88.

The spelling of 999890098999 in words is "nine hundred ninety-nine billion, eight hundred ninety million, ninety-eight thousand, nine hundred ninety-nine".