12138435739 has 2 divisors, whose sum is σ = 12138435740. Its totient is φ = 12138435738.

The previous prime is 12138435731. The next prime is 12138435763. The reversal of 12138435739 is 93753483121.

12138435739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12138435739 - 2³ = 12138435731 is a prime.

It is a super-2 number, since 2×12138435739² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12138435731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069217869 + 6069217870.

It is an arithmetic number, because the mean of its divisors is an integer number (6069217870).

Almost surely, 2^12138435739 is an apocalyptic number.

12138435739 is a deficient number, since it is larger than the sum of its proper divisors (1).

12138435739 is an equidigital number, since it uses as much as digits as its factorization.

12138435739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The spelling of 12138435739 in words is "twelve billion, one hundred thirty-eight million, four hundred thirty-five thousand, seven hundred thirty-nine".