12739389 has 12 divisors (see below), whose sum is σ = 18393696. Its totient is φ = 7839312.

The previous prime is 12739387. The next prime is 12739393. The reversal of 12739389 is 98393721.

12739389 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 12739389 - 2¹ = 12739387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12739389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12057 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (1532808).

Almost surely, 2^12739389 is an apocalyptic number.

It is an amenable number.

12739389 is a deficient number, since it is larger than the sum of its proper divisors (5654307).

12739389 is a wasteful number, since it uses less digits than its factorization.

12739389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25156 (or 25143 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 12739389 is about 3569.2280678040. The cubic root of 12739389 is about 233.5516104831.

The spelling of 12739389 in words is "twelve million, seven hundred thirty-nine thousand, three hundred eighty-nine".