128345339 has 4 divisors (see below), whose sum is σ = 128400360. Its totient is φ = 128290320.

The previous prime is 128345333. The next prime is 128345369. The reversal of 128345339 is 933543821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933543821 = 7 ⋅133363403.

It is a cyclic number.

It is not a de Polignac number, because 128345339 - 2¹⁶ = 128279803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128345333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23849 + ... + 28730.

It is an arithmetic number, because the mean of its divisors is an integer number (32100090).

Almost surely, 2^128345339 is an apocalyptic number.

128345339 is a deficient number, since it is larger than the sum of its proper divisors (55021).

128345339 is an equidigital number, since it uses as much as digits as its factorization.

128345339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55020.

The product of its digits is 77760, while the sum is 38.

The square root of 128345339 is about 11328.9601905912. The cubic root of 128345339 is about 504.4212420066.

The spelling of 128345339 in words is "one hundred twenty-eight million, three hundred forty-five thousand, three hundred thirty-nine".