128876123 has 4 divisors (see below), whose sum is σ = 129124008. Its totient is φ = 128628240.

The previous prime is 128876093. The next prime is 128876129. The reversal of 128876123 is 321678821.

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 128876123 - 2⁸ = 128875867 is a prime.

It is a super-2 number, since 2×128876123² = 33218110159022258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128876129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123161 + ... + 124202.

It is an arithmetic number, because the mean of its divisors is an integer number (32281002).

Almost surely, 2^128876123 is an apocalyptic number.

128876123 is a deficient number, since it is larger than the sum of its proper divisors (247885).

128876123 is an equidigital number, since it uses as much as digits as its factorization.

128876123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247884.

The product of its digits is 32256, while the sum is 38.

The square root of 128876123 is about 11352.3620009230. The cubic root of 128876123 is about 505.1156458346.

The spelling of 128876123 in words is "one hundred twenty-eight million, eight hundred seventy-six thousand, one hundred twenty-three".