128084974939 has 4 divisors (see below), whose sum is σ = 131208998760. Its totient is φ = 124960951120.

The previous prime is 128084974909. The next prime is 128084974943. The reversal of 128084974939 is 939479480821.

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 128084974939 - 2¹¹ = 128084972891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128084974909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1562011849 + ... + 1562011930.

It is an arithmetic number, because the mean of its divisors is an integer number (32802249690).

Almost surely, 2^128084974939 is an apocalyptic number.

128084974939 is a deficient number, since it is larger than the sum of its proper divisors (3124023821).

128084974939 is an equidigital number, since it uses as much as digits as its factorization.

128084974939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124023820.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 128084974939 in words is "one hundred twenty-eight billion, eighty-four million, nine hundred seventy-four thousand, nine hundred thirty-nine".