128694005 has 16 divisors (see below), whose sum is σ = 169971264. Its totient is φ = 92762880.

The previous prime is 128694001. The next prime is 128694023. The reversal of 128694005 is 500496821.

It is not a de Polignac number, because 128694005 - 2² = 128694001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128694001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4139 + ... + 16568.

It is an arithmetic number, because the mean of its divisors is an integer number (10623204).

Almost surely, 2^128694005 is an apocalyptic number.

It is an amenable number.

128694005 is a deficient number, since it is larger than the sum of its proper divisors (41277259).

128694005 is a wasteful number, since it uses less digits than its factorization.

128694005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20836.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 128694005 is about 11344.3380150628. The cubic root of 128694005 is about 504.8776032489.

The spelling of 128694005 in words is "one hundred twenty-eight million, six hundred ninety-four thousand, five".