123129840933 has 20 divisors (see below), whose sum is σ = 200656038528. Its totient is φ = 74624145480.

The previous prime is 123129840871. The next prime is 123129840937. The reversal of 123129840933 is 339048921321.

123129840933 is a `hidden beast` number, since 1 + 231 + 2 + 9 + 8 + 409 + 3 + 3 = 666.

It is not a de Polignac number, because 123129840933 - 2²⁹ = 122592970021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123129840937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69095541 + ... + 69097322.

Almost surely, 2^123129840933 is an apocalyptic number.

It is an amenable number.

123129840933 is a deficient number, since it is larger than the sum of its proper divisors (77526197595).

123129840933 is a wasteful number, since it uses less digits than its factorization.

123129840933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138192886 (or 138192877 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 123129840933 in words is "one hundred twenty-three billion, one hundred twenty-nine million, eight hundred forty thousand, nine hundred thirty-three".