128584163 has 4 divisors (see below), whose sum is σ = 129038808. Its totient is φ = 128129520.

The previous prime is 128584129. The next prime is 128584177. The reversal of 128584163 is 361485821.

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 128584163 - 2²⁰ = 127535587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128584103) 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, 226898 + ... + 227463.

It is an arithmetic number, because the mean of its divisors is an integer number (32259702).

Almost surely, 2^128584163 is an apocalyptic number.

128584163 is a deficient number, since it is larger than the sum of its proper divisors (454645).

128584163 is an equidigital number, since it uses as much as digits as its factorization.

128584163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454644.

The product of its digits is 46080, while the sum is 38.

The square root of 128584163 is about 11339.4957118912. The cubic root of 128584163 is about 504.7339225057.

The spelling of 128584163 in words is "one hundred twenty-eight million, five hundred eighty-four thousand, one hundred sixty-three".