128724050939 has 8 divisors (see below), whose sum is σ = 142004061360. Its totient is φ = 115707011200.

The previous prime is 128724050879. The next prime is 128724050999. The reversal of 128724050939 is 939050427821.

It is an interprime number because it is at equal distance from previous prime (128724050879) and next prime (128724050999).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-128724050939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128724050999) 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 7 ways as a sum of consecutive naturals, for example, 65741642 + ... + 65743599.

It is an arithmetic number, because the mean of its divisors is an integer number (17750507670).

Almost surely, 2^128724050939 is an apocalyptic number.

128724050939 is a deficient number, since it is larger than the sum of its proper divisors (13280010421).

128724050939 is a wasteful number, since it uses less digits than its factorization.

128724050939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131485341.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 128724050939 in words is "one hundred twenty-eight billion, seven hundred twenty-four million, fifty thousand, nine hundred thirty-nine".