123142342439 has 2 divisors, whose sum is σ = 123142342440. Its totient is φ = 123142342438.

The previous prime is 123142342321. The next prime is 123142342441. The reversal of 123142342439 is 934243241321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123142342439 is a prime.

It is a Sophie Germain prime.

Together with 123142342441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123148342439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61571171219 + 61571171220.

It is an arithmetic number, because the mean of its divisors is an integer number (61571171220).

Almost surely, 2^123142342439 is an apocalyptic number.

123142342439 is a deficient number, since it is larger than the sum of its proper divisors (1).

123142342439 is an equidigital number, since it uses as much as digits as its factorization.

123142342439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The spelling of 123142342439 in words is "one hundred twenty-three billion, one hundred forty-two million, three hundred forty-two thousand, four hundred thirty-nine".