123425138977769 has 2 divisors, whose sum is σ = 123425138977770. Its totient is φ = 123425138977768.

The previous prime is 123425138977717. The next prime is 123425138977817. The reversal of 123425138977769 is 967779831524321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122097085560025 + 1328053417744 = 11049755^2 + 1152412^2 .

It is a cyclic number.

It is not a de Polignac number, because 123425138977769 - 2⁸ = 123425138977513 is a prime.

It is a super-2 number, since 2×123425138977769² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123425138977696 and 123425138977705.

It is not a weakly prime, because it can be changed into another prime (123425138977969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61712569488884 + 61712569488885.

It is an arithmetic number, because the mean of its divisors is an integer number (61712569488885).

Almost surely, 2^{123425138977769} is an apocalyptic number.

It is an amenable number.

123425138977769 is a deficient number, since it is larger than the sum of its proper divisors (1).

123425138977769 is an equidigital number, since it uses as much as digits as its factorization.

123425138977769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960180480, while the sum is 74.

The spelling of 123425138977769 in words is "one hundred twenty-three trillion, four hundred twenty-five billion, one hundred thirty-eight million, nine hundred seventy-seven thousand, seven hundred sixty-nine".