123137931238 has 16 divisors (see below), whose sum is σ = 213183634464. Its totient is φ = 52250889600.

The previous prime is 123137931233. The next prime is 123137931247. The reversal of 123137931238 is 832139731321.

It is a junction number, because it is equal to n+sod(n) for n = 123137931194 and 123137931203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123137931233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43540995 + ... + 43543822.

It is an arithmetic number, because the mean of its divisors is an integer number (13323977154).

Almost surely, 2^123137931238 is an apocalyptic number.

123137931238 is a deficient number, since it is larger than the sum of its proper divisors (90045703226).

123137931238 is a wasteful number, since it uses less digits than its factorization.

123137931238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87084927.

The product of its digits is 163296, while the sum is 43.

The spelling of 123137931238 in words is "one hundred twenty-three billion, one hundred thirty-seven million, nine hundred thirty-one thousand, two hundred thirty-eight".