128704007 has 4 divisors (see below), whose sum is σ = 129086256. Its totient is φ = 128321760.

The previous prime is 128704003. The next prime is 128704049. The reversal of 128704007 is 700407821.

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 128704007 - 2² = 128704003 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 (128704003) 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 3 ways as a sum of consecutive naturals, for example, 190619 + ... + 191292.

It is an arithmetic number, because the mean of its divisors is an integer number (32271564).

Almost surely, 2^128704007 is an apocalyptic number.

128704007 is a deficient number, since it is larger than the sum of its proper divisors (382249).

128704007 is an equidigital number, since it uses as much as digits as its factorization.

128704007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382248.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 128704007 is about 11344.7788431507. The cubic root of 128704007 is about 504.8906824776.

The spelling of 128704007 in words is "one hundred twenty-eight million, seven hundred four thousand, seven".