123889712 has 20 divisors (see below), whose sum is σ = 240691440. Its totient is φ = 61775808.

The previous prime is 123889681. The next prime is 123889729. The reversal of 123889712 is 217988321.

It is a self number, because there is not a number n which added to its sum of digits gives 123889712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412 + ... + 16347.

It is an arithmetic number, because the mean of its divisors is an integer number (12034572).

Almost surely, 2^123889712 is an apocalyptic number.

It is an amenable number.

123889712 is a deficient number, since it is larger than the sum of its proper divisors (116801728).

123889712 is a wasteful number, since it uses less digits than its factorization.

123889712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21140 (or 21134 counting only the distinct ones).

The product of its digits is 48384, while the sum is 41.

The square root of 123889712 is about 11130.5755466642. The cubic root of 123889712 is about 498.5152111687.

The spelling of 123889712 in words is "one hundred twenty-three million, eight hundred eighty-nine thousand, seven hundred twelve".