128339123 has 12 divisors (see below), whose sum is σ = 145011048. Its totient is φ = 112640640.

The previous prime is 128339119. The next prime is 128339153. The reversal of 128339123 is 321933821.

It is not a de Polignac number, because 128339123 - 2² = 128339119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128339123.

It is not an unprimeable number, because it can be changed into a prime (128339153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2315 + ... + 16187.

It is an arithmetic number, because the mean of its divisors is an integer number (12084254).

Almost surely, 2^128339123 is an apocalyptic number.

128339123 is a deficient number, since it is larger than the sum of its proper divisors (16671925).

128339123 is a wasteful number, since it uses less digits than its factorization.

128339123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13942 (or 13913 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 128339123 is about 11328.6858461165. The cubic root of 128339123 is about 504.4130985267.

The spelling of 128339123 in words is "one hundred twenty-eight million, three hundred thirty-nine thousand, one hundred twenty-three".