123387128943 has 16 divisors (see below), whose sum is σ = 177801780576. Its totient is φ = 75660318720.

The previous prime is 123387128927. The next prime is 123387128947. The reversal of 123387128943 is 349821783321.

It is not a de Polignac number, because 123387128943 - 2⁴ = 123387128927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123387128947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5618530 + ... + 5640447.

It is an arithmetic number, because the mean of its divisors is an integer number (11112611286).

Almost surely, 2^123387128943 is an apocalyptic number.

123387128943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123387128943 is a deficient number, since it is larger than the sum of its proper divisors (54414651633).

123387128943 is a wasteful number, since it uses less digits than its factorization.

123387128943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11259274.

The product of its digits is 1741824, while the sum is 51.

The spelling of 123387128943 in words is "one hundred twenty-three billion, three hundred eighty-seven million, one hundred twenty-eight thousand, nine hundred forty-three".