128673607 has 4 divisors (see below), whose sum is σ = 128715760. Its totient is φ = 128631456.

The previous prime is 128673563. The next prime is 128673617. The reversal of 128673607 is 706376821.

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 128673607 - 2¹¹ = 128671559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128673607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128673617) 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, 16107 + ... + 22732.

It is an arithmetic number, because the mean of its divisors is an integer number (32178940).

Almost surely, 2^128673607 is an apocalyptic number.

128673607 is a deficient number, since it is larger than the sum of its proper divisors (42153).

128673607 is an equidigital number, since it uses as much as digits as its factorization.

128673607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42152.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 128673607 is about 11343.4389406388. The cubic root of 128673607 is about 504.8509274725.

The spelling of 128673607 in words is "one hundred twenty-eight million, six hundred seventy-three thousand, six hundred seven".