128219959 has 8 divisors (see below), whose sum is σ = 146630528. Its totient is φ = 109832760.

The previous prime is 128219951. The next prime is 128219983. The reversal of 128219959 is 959912821.

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

It is a cyclic number.

It is not a de Polignac number, because 128219959 - 2³ = 128219951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128219951) 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, 8164 + ... + 17974.

It is an arithmetic number, because the mean of its divisors is an integer number (18328816).

Almost surely, 2^128219959 is an apocalyptic number.

128219959 is a deficient number, since it is larger than the sum of its proper divisors (18410569).

128219959 is an equidigital number, since it uses as much as digits as its factorization.

128219959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11685.

The product of its digits is 116640, while the sum is 46.

The square root of 128219959 is about 11323.4252326758. The cubic root of 128219959 is about 504.2569328561.

The spelling of 128219959 in words is "one hundred twenty-eight million, two hundred nineteen thousand, nine hundred fifty-nine".