123984028187 has 4 divisors (see below), whose sum is σ = 125187756720. Its totient is φ = 122780299656.

The previous prime is 123984028141. The next prime is 123984028247. The reversal of 123984028187 is 781820489321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123984028187 - 2¹⁶ = 123983962651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123984028127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601864112 + ... + 601864317.

It is an arithmetic number, because the mean of its divisors is an integer number (31296939180).

Almost surely, 2^123984028187 is an apocalyptic number.

123984028187 is a deficient number, since it is larger than the sum of its proper divisors (1203728533).

123984028187 is a wasteful number, since it uses less digits than its factorization.

123984028187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203728532.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 123984028187 in words is "one hundred twenty-three billion, nine hundred eighty-four million, twenty-eight thousand, one hundred eighty-seven".