123343129105877 has 2 divisors, whose sum is σ = 123343129105878. Its totient is φ = 123343129105876.

The previous prime is 123343129105873. The next prime is 123343129105961. The reversal of 123343129105877 is 778501921343321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113833343671441 + 9509785434436 = 10669271^2 + 3083794^2 .

It is a cyclic number.

It is not a de Polignac number, because 123343129105877 - 2² = 123343129105873 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123343129105873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61671564552938 + 61671564552939.

It is an arithmetic number, because the mean of its divisors is an integer number (61671564552939).

Almost surely, 2^{123343129105877} is an apocalyptic number.

It is an amenable number.

123343129105877 is a deficient number, since it is larger than the sum of its proper divisors (1).

123343129105877 is an equidigital number, since it uses as much as digits as its factorization.

123343129105877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 123343129105877 in words is "one hundred twenty-three trillion, three hundred forty-three billion, one hundred twenty-nine million, one hundred five thousand, eight hundred seventy-seven".