12238843913 has 2 divisors, whose sum is σ = 12238843914. Its totient is φ = 12238843912.

The previous prime is 12238843861. The next prime is 12238843919. The reversal of 12238843913 is 31934883221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8094960784 + 4143883129 = 89972^2 + 64373^2 .

It is a cyclic number.

It is not a de Polignac number, because 12238843913 - 2⁶ = 12238843849 is a prime.

It is not a weakly prime, because it can be changed into another prime (12238843919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119421956 + 6119421957.

It is an arithmetic number, because the mean of its divisors is an integer number (6119421957).

Almost surely, 2^12238843913 is an apocalyptic number.

It is an amenable number.

12238843913 is a deficient number, since it is larger than the sum of its proper divisors (1).

12238843913 is an equidigital number, since it uses as much as digits as its factorization.

12238843913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The spelling of 12238843913 in words is "twelve billion, two hundred thirty-eight million, eight hundred forty-three thousand, nine hundred thirteen".