128679 has 8 divisors (see below), whose sum is σ = 174720. Its totient is φ = 84216.

The previous prime is 128677. The next prime is 128683. The reversal of 128679 is 976821.

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

It is not a de Polignac number, because 128679 - 2¹ = 128677 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2¹²⁸⁶⁷⁹ is an apocalyptic number.

128679 is a deficient number, since it is larger than the sum of its proper divisors (46041).

128679 is an equidigital number, since it uses as much as digits as its factorization.

128679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789.

The product of its digits is 6048, while the sum is 33.

The square root of 128679 is about 358.7185526287. The cubic root of 128679 is about 50.4857980520.

It can be divided in two parts, 1 and 28679, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 128679 in words is "one hundred twenty-eight thousand, six hundred seventy-nine".