128591673 has 8 divisors (see below), whose sum is σ = 195949248. Its totient is φ = 73480944.

The previous prime is 128591669. The next prime is 128591699. The reversal of 128591673 is 376195821.

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

It is not a de Polignac number, because 128591673 - 2² = 128591669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128591623) 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, 3061686 + ... + 3061727.

It is an arithmetic number, because the mean of its divisors is an integer number (24493656).

Almost surely, 2^128591673 is an apocalyptic number.

It is an amenable number.

128591673 is a deficient number, since it is larger than the sum of its proper divisors (67357575).

128591673 is an equidigital number, since it uses as much as digits as its factorization.

128591673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6123423.

The product of its digits is 90720, while the sum is 42.

The square root of 128591673 is about 11339.8268505299. The cubic root of 128591673 is about 504.7437486975.

The spelling of 128591673 in words is "one hundred twenty-eight million, five hundred ninety-one thousand, six hundred seventy-three".