128430859 has 2 divisors, whose sum is σ = 128430860. Its totient is φ = 128430858.

The previous prime is 128430851. The next prime is 128430943. The reversal of 128430859 is 958034821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128430859 - 2³ = 128430851 is a prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (128430851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64215429 + 64215430.

It is an arithmetic number, because the mean of its divisors is an integer number (64215430).

Almost surely, 2^128430859 is an apocalyptic number.

128430859 is a deficient number, since it is larger than the sum of its proper divisors (1).

128430859 is an equidigital number, since it uses as much as digits as its factorization.

128430859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 128430859 is about 11332.7339596410. The cubic root of 128430859 is about 504.5332536754.

The spelling of 128430859 in words is "one hundred twenty-eight million, four hundred thirty thousand, eight hundred fifty-nine".