13000243123 has 4 divisors (see below), whose sum is σ = 14857420720. Its totient is φ = 11143065528.

The previous prime is 13000243117. The next prime is 13000243127. The reversal of 13000243123 is 32134200031.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13000243123 - 2²⁹ = 12463372211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13000243123.

It is not an unprimeable number, because it can be changed into a prime (13000243127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 928588788 + ... + 928588801.

It is an arithmetic number, because the mean of its divisors is an integer number (3714355180).

Almost surely, 2^13000243123 is an apocalyptic number.

13000243123 is a deficient number, since it is larger than the sum of its proper divisors (1857177597).

13000243123 is an equidigital number, since it uses as much as digits as its factorization.

13000243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857177596.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 13000243123 its reverse (32134200031), we get a palindrome (45134443154).

The spelling of 13000243123 in words is "thirteen billion, two hundred forty-three thousand, one hundred twenty-three".