12999889 has 8 divisors (see below), whose sum is σ = 15202880. Its totient is φ = 10883376.

The previous prime is 12999869. The next prime is 12999919. The reversal of 12999889 is 98899921.

12999889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12999889 - 2¹⁵ = 12967121 is a prime.

It is a super-2 number, since 2×12999889² = 337994228024642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12999869) 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, 21294 + ... + 21895.

It is an arithmetic number, because the mean of its divisors is an integer number (1900360).

Almost surely, 2^12999889 is an apocalyptic number.

It is an amenable number.

12999889 is a deficient number, since it is larger than the sum of its proper divisors (2202991).

12999889 is an equidigital number, since it uses as much as digits as its factorization.

12999889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43239.

The product of its digits is 839808, while the sum is 55.

The square root of 12999889 is about 3605.5358825007. The cubic root of 12999889 is about 235.1327995441.

The spelling of 12999889 in words is "twelve million, nine hundred ninety-nine thousand, eight hundred eighty-nine".