123742115179 has 2 divisors, whose sum is σ = 123742115180. Its totient is φ = 123742115178.

The previous prime is 123742115089. The next prime is 123742115191. The reversal of 123742115179 is 971511247321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123742115179 - 2²⁷ = 123607897451 is a prime.

It is a super-2 number, since 2×123742115179² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123742115579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61871057589 + 61871057590.

It is an arithmetic number, because the mean of its divisors is an integer number (61871057590).

Almost surely, 2^123742115179 is an apocalyptic number.

123742115179 is a deficient number, since it is larger than the sum of its proper divisors (1).

123742115179 is an equidigital number, since it uses as much as digits as its factorization.

123742115179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 43.

The spelling of 123742115179 in words is "one hundred twenty-three billion, seven hundred forty-two million, one hundred fifteen thousand, one hundred seventy-nine".