128315579 has 8 divisors (see below), whose sum is σ = 146726880. Its totient is φ = 109924416.

The previous prime is 128315573. The next prime is 128315581. The reversal of 128315579 is 975513821.

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

It is not a de Polignac number, because 128315579 - 2⁸ = 128315323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128315573) 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 7 ways as a sum of consecutive naturals, for example, 12887 + ... + 20559.

It is an arithmetic number, because the mean of its divisors is an integer number (18340860).

Almost surely, 2^128315579 is an apocalyptic number.

128315579 is a deficient number, since it is larger than the sum of its proper divisors (18411301).

128315579 is an equidigital number, since it uses as much as digits as its factorization.

128315579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10069.

The product of its digits is 75600, while the sum is 41.

The square root of 128315579 is about 11327.6466664528. The cubic root of 128315579 is about 504.3822515332.

The spelling of 128315579 in words is "one hundred twenty-eight million, three hundred fifteen thousand, five hundred seventy-nine".