128789007 has 4 divisors (see below), whose sum is σ = 171718680. Its totient is φ = 85859336.

The previous prime is 128788969. The next prime is 128789021. The reversal of 128789007 is 700987821.

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 128789007 - 2⁷ = 128788879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128789007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128789047) 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, 21464832 + ... + 21464837.

It is an arithmetic number, because the mean of its divisors is an integer number (42929670).

Almost surely, 2^128789007 is an apocalyptic number.

128789007 is a deficient number, since it is larger than the sum of its proper divisors (42929673).

128789007 is an equidigital number, since it uses as much as digits as its factorization.

128789007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42929672.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 128789007 is about 11348.5244415298. The cubic root of 128789007 is about 505.0018063524.

The spelling of 128789007 in words is "one hundred twenty-eight million, seven hundred eighty-nine thousand, seven".