128137859 has 2 divisors, whose sum is σ = 128137860. Its totient is φ = 128137858.

The previous prime is 128137831. The next prime is 128137897. The reversal of 128137859 is 958731821.

It is a weak prime.

It is an emirp because it is prime and its reverse (958731821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128137859 - 2²⁴ = 111360643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128130859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64068929 + 64068930.

It is an arithmetic number, because the mean of its divisors is an integer number (64068930).

Almost surely, 2^128137859 is an apocalyptic number.

128137859 is a deficient number, since it is larger than the sum of its proper divisors (1).

128137859 is an equidigital number, since it uses as much as digits as its factorization.

128137859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 128137859 is about 11319.7994240181. The cubic root of 128137859 is about 504.1492836420.

The spelling of 128137859 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred fifty-nine".