123256936079 has 2 divisors, whose sum is σ = 123256936080. Its totient is φ = 123256936078.

The previous prime is 123256936063. The next prime is 123256936081. The reversal of 123256936079 is 970639652321.

It is a strong prime.

It is an emirp because it is prime and its reverse (970639652321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123256936079 - 2⁴ = 123256936063 is a prime.

Together with 123256936081, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123256936079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123256936679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628468039 + 61628468040.

It is an arithmetic number, because the mean of its divisors is an integer number (61628468040).

Almost surely, 2^123256936079 is an apocalyptic number.

123256936079 is a deficient number, since it is larger than the sum of its proper divisors (1).

123256936079 is an equidigital number, since it uses as much as digits as its factorization.

123256936079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 123256936079 in words is "one hundred twenty-three billion, two hundred fifty-six million, nine hundred thirty-six thousand, seventy-nine".