128305379 has 4 divisors (see below), whose sum is σ = 128367720. Its totient is φ = 128243040.

The previous prime is 128305369. The next prime is 128305391. The reversal of 128305379 is 973503821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 973503821 = 199 ⋅4891979.

It is a cyclic number.

It is not a de Polignac number, because 128305379 - 2⁴ = 128305363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128305319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27974 + ... + 32235.

It is an arithmetic number, because the mean of its divisors is an integer number (32091930).

Almost surely, 2^128305379 is an apocalyptic number.

128305379 is a deficient number, since it is larger than the sum of its proper divisors (62341).

128305379 is an equidigital number, since it uses as much as digits as its factorization.

128305379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62340.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 128305379 is about 11327.1964315977. The cubic root of 128305379 is about 504.3688864757.

The spelling of 128305379 in words is "one hundred twenty-eight million, three hundred five thousand, three hundred seventy-nine".