9899990999989 has 4 divisors (see below), whose sum is σ = 9901362387040. Its totient is φ = 9898619612940.

The previous prime is 9899990999887. The next prime is 9899991000017.

9899990999989 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9899990999989 - 2⁷ = 9899990999861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9899990999891 and 9899990999900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899990999489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685682697 + ... + 685697134.

It is an arithmetic number, because the mean of its divisors is an integer number (2475340596760).

Almost surely, 2^{9899990999989} is an apocalyptic number.

It is an amenable number.

9899990999989 is a deficient number, since it is larger than the sum of its proper divisors (1371387051).

9899990999989 is a wasteful number, since it uses less digits than its factorization.

9899990999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371387050.

The product of its (nonzero) digits is 223154201664, while the sum is 106.

The spelling of 9899990999989 in words is "nine trillion, eight hundred ninety-nine billion, nine hundred ninety million, nine hundred ninety-nine thousand, nine hundred eighty-nine".