123631869 has 16 divisors (see below), whose sum is σ = 166659584. Its totient is φ = 81518400.

The previous prime is 123631853. The next prime is 123631889. The reversal of 123631869 is 968136321.

It is not a de Polignac number, because 123631869 - 2⁴ = 123631853 is a prime.

It is a super-2 number, since 2×123631869² = 30569678064866322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123631819) 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, 120579 + ... + 121599.

It is an arithmetic number, because the mean of its divisors is an integer number (10416224).

Almost surely, 2^123631869 is an apocalyptic number.

It is an amenable number.

123631869 is a deficient number, since it is larger than the sum of its proper divisors (43027715).

123631869 is a wasteful number, since it uses less digits than its factorization.

123631869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428.

The product of its digits is 46656, while the sum is 39.

The square root of 123631869 is about 11118.9868693150. The cubic root of 123631869 is about 498.1691293416.

The spelling of 123631869 in words is "one hundred twenty-three million, six hundred thirty-one thousand, eight hundred sixty-nine".