12989139 has 16 divisors (see below), whose sum is σ = 18767232. Its totient is φ = 7959168.

The previous prime is 12989131. The next prime is 12989143. The reversal of 12989139 is 93198921.

12989139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12989139 - 2³ = 12989131 is a prime.

It is a super-2 number, since 2×12989139² = 337435463922642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12989139.

It is not an unprimeable number, because it can be changed into a prime (12989131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769 + ... + 5154.

It is an arithmetic number, because the mean of its divisors is an integer number (1172952).

Almost surely, 2^12989139 is an apocalyptic number.

12989139 is a deficient number, since it is larger than the sum of its proper divisors (5778093).

12989139 is a wasteful number, since it uses less digits than its factorization.

12989139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5986.

The product of its digits is 34992, while the sum is 42.

The square root of 12989139 is about 3604.0448110422. The cubic root of 12989139 is about 235.0679688713.

The spelling of 12989139 in words is "twelve million, nine hundred eighty-nine thousand, one hundred thirty-nine".