13089876921 has 27 divisors (see below), whose sum is σ = 20788730053. Its totient is φ = 7930970520.

The previous prime is 13089876913. The next prime is 13089876923. The reversal of 13089876921 is 12967898031.

The square root of 13089876921 is 114411.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13089876921 - 2³ = 13089876913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13089876923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3773830 + ... + 3777296.

Almost surely, 2^13089876921 is an apocalyptic number.

13089876921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13089876921 is the 114411-st square number.

13089876921 is the 57206-th centered octagonal number.

It is an amenable number.

13089876921 is a deficient number, since it is larger than the sum of its proper divisors (7698853132).

13089876921 is an frugal number, since it uses more digits than its factorization.

13089876921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962 (or 3481 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 13089876921 in words is "thirteen billion, eighty-nine million, eight hundred seventy-six thousand, nine hundred twenty-one".