12389538723 has 16 divisors (see below), whose sum is σ = 16622557056. Its totient is φ = 8208224640.

The previous prime is 12389538719. The next prime is 12389538743. The reversal of 12389538723 is 32783598321.

It is a happy number.

It is not a de Polignac number, because 12389538723 - 2² = 12389538719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12389538713) 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 15 ways as a sum of consecutive naturals, for example, 418011 + ... + 446667.

It is an arithmetic number, because the mean of its divisors is an integer number (1038909816).

Almost surely, 2^12389538723 is an apocalyptic number.

12389538723 is a deficient number, since it is larger than the sum of its proper divisors (4233018333).

12389538723 is a wasteful number, since it uses less digits than its factorization.

12389538723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29554.

The product of its digits is 2177280, while the sum is 51.

The spelling of 12389538723 in words is "twelve billion, three hundred eighty-nine million, five hundred thirty-eight thousand, seven hundred twenty-three".