123239885 has 16 divisors (see below), whose sum is σ = 157427712. Its totient is φ = 92294400.

The previous prime is 123239881. The next prime is 123239903. The reversal of 123239885 is 588932321.

It is not a de Polignac number, because 123239885 - 2² = 123239881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123239881) 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 15 ways as a sum of consecutive naturals, for example, 12440 + ... + 20030.

It is an arithmetic number, because the mean of its divisors is an integer number (9839232).

Almost surely, 2^123239885 is an apocalyptic number.

It is an amenable number.

123239885 is a deficient number, since it is larger than the sum of its proper divisors (34187827).

123239885 is a wasteful number, since it uses less digits than its factorization.

123239885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7804.

The product of its digits is 103680, while the sum is 41.

The square root of 123239885 is about 11101.3460895515. The cubic root of 123239885 is about 497.6420778860.

The spelling of 123239885 in words is "one hundred twenty-three million, two hundred thirty-nine thousand, eight hundred eighty-five".