12040138879 has 2 divisors, whose sum is σ = 12040138880. Its totient is φ = 12040138878.

The previous prime is 12040138811. The next prime is 12040138897. The reversal of 12040138879 is 97883104021.

Together with next prime (12040138897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12040138879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12040133879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6020069439 + 6020069440.

It is an arithmetic number, because the mean of its divisors is an integer number (6020069440).

Almost surely, 2^12040138879 is an apocalyptic number.

12040138879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12040138879 is an equidigital number, since it uses as much as digits as its factorization.

12040138879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 12040138879 in words is "twelve billion, forty million, one hundred thirty-eight thousand, eight hundred seventy-nine".