123631689 has 48 divisors (see below), whose sum is σ = 187160640. Its totient is φ = 72316800.

The previous prime is 123631637. The next prime is 123631699. The reversal of 123631689 is 986136321.

It is not a de Polignac number, because 123631689 - 2⁷ = 123631561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123631699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2026719 + ... + 2026779.

It is an arithmetic number, because the mean of its divisors is an integer number (3899180).

Almost surely, 2^123631689 is an apocalyptic number.

123631689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123631689 is a deficient number, since it is larger than the sum of its proper divisors (63528951).

123631689 is a wasteful number, since it uses less digits than its factorization.

123631689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 151 counting only the distinct ones).

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

The square root of 123631689 is about 11118.9787750494. The cubic root of 123631689 is about 498.1688875741.

The spelling of 123631689 in words is "one hundred twenty-three million, six hundred thirty-one thousand, six hundred eighty-nine".