123188923 has 16 divisors (see below), whose sum is σ = 145073376. Its totient is φ = 103127040.

The previous prime is 123188921. The next prime is 123188941. The reversal of 123188923 is 329881321.

It is a cyclic number.

It is not a de Polignac number, because 123188923 - 2¹ = 123188921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123188921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81765 + ... + 83257.

It is an arithmetic number, because the mean of its divisors is an integer number (9067086).

Almost surely, 2^123188923 is an apocalyptic number.

123188923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123188923 is a deficient number, since it is larger than the sum of its proper divisors (21884453).

123188923 is a wasteful number, since it uses less digits than its factorization.

123188923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094.

The product of its digits is 20736, while the sum is 37.

The square root of 123188923 is about 11099.0505449791. The cubic root of 123188923 is about 497.5734736564.

The spelling of 123188923 in words is "one hundred twenty-three million, one hundred eighty-eight thousand, nine hundred twenty-three".