128607859 has 4 divisors (see below), whose sum is σ = 128670016. Its totient is φ = 128545704.

The previous prime is 128607847. The next prime is 128607863. The reversal of 128607859 is 958706821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128607859 - 2¹⁵ = 128575091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128607359) 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, 27864 + ... + 32149.

It is an arithmetic number, because the mean of its divisors is an integer number (32167504).

Almost surely, 2^128607859 is an apocalyptic number.

128607859 is a deficient number, since it is larger than the sum of its proper divisors (62157).

128607859 is an equidigital number, since it uses as much as digits as its factorization.

128607859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62156.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 128607859 is about 11340.5405074009. The cubic root of 128607859 is about 504.7649253916.

The spelling of 128607859 in words is "one hundred twenty-eight million, six hundred seven thousand, eight hundred fifty-nine".