123904689 has 8 divisors (see below), whose sum is σ = 165513792. Its totient is φ = 82449360.

The previous prime is 123904667. The next prime is 123904751. The reversal of 123904689 is 986409321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123904689 - 2¹¹ = 123902641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123904689.

It is not an unprimeable number, because it can be changed into a prime (123904639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36549 + ... + 39794.

It is an arithmetic number, because the mean of its divisors is an integer number (20689224).

Almost surely, 2^123904689 is an apocalyptic number.

It is an amenable number.

123904689 is a deficient number, since it is larger than the sum of its proper divisors (41609103).

123904689 is an equidigital number, since it uses as much as digits as its factorization.

123904689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76887.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 123904689 is about 11131.2483127455. The cubic root of 123904689 is about 498.5352988240.

The spelling of 123904689 in words is "one hundred twenty-three million, nine hundred four thousand, six hundred eighty-nine".