123423217137 has 96 divisors (see below), whose sum is σ = 198986261760. Its totient is φ = 73098754560.

The previous prime is 123423217133. The next prime is 123423217187. The reversal of 123423217137 is 731712324321.

123423217137 is a `hidden beast` number, since 1 + 2 + 3 + 423 + 217 + 13 + 7 = 666.

It is not a de Polignac number, because 123423217137 - 2² = 123423217133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123423217133) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 445571043 + ... + 445571319.

It is an arithmetic number, because the mean of its divisors is an integer number (2072773560).

Almost surely, 2^123423217137 is an apocalyptic number.

It is an amenable number.

123423217137 is a deficient number, since it is larger than the sum of its proper divisors (75563044623).

123423217137 is a wasteful number, since it uses less digits than its factorization.

123423217137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 820 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The spelling of 123423217137 in words is "one hundred twenty-three billion, four hundred twenty-three million, two hundred seventeen thousand, one hundred thirty-seven".