128579559 has 4 divisors (see below), whose sum is σ = 171439416. Its totient is φ = 85719704.

The previous prime is 128579557. The next prime is 128579573. The reversal of 128579559 is 955975821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955975821 = 3 ⋅318658607.

It is a cyclic number.

It is not a de Polignac number, because 128579559 - 2¹ = 128579557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128579557) 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, 21429924 + ... + 21429929.

It is an arithmetic number, because the mean of its divisors is an integer number (42859854).

Almost surely, 2^128579559 is an apocalyptic number.

128579559 is a deficient number, since it is larger than the sum of its proper divisors (42859857).

128579559 is an equidigital number, since it uses as much as digits as its factorization.

128579559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42859856.

The product of its digits is 1134000, while the sum is 51.

The square root of 128579559 is about 11339.2927028100. The cubic root of 128579559 is about 504.7278983768.

The spelling of 128579559 in words is "one hundred twenty-eight million, five hundred seventy-nine thousand, five hundred fifty-nine".