123891904 has 14 divisors (see below), whose sum is σ = 245848124. Its totient is φ = 61945920.

The previous prime is 123891871. The next prime is 123891923. The reversal of 123891904 is 409198321.

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 as a sum of consecutive naturals, namely, 967842 + ... + 967969.

Almost surely, 2^123891904 is an apocalyptic number.

It is an amenable number.

123891904 is a deficient number, since it is larger than the sum of its proper divisors (121956220).

123891904 is an equidigital number, since it uses as much as digits as its factorization.

123891904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935823 (or 1935813 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 123891904 is about 11130.6740137334. The cubic root of 123891904 is about 498.5181512539.

The spelling of 123891904 in words is "one hundred twenty-three million, eight hundred ninety-one thousand, nine hundred four".