928608665 has 4 divisors (see below), whose sum is σ = 1114330404. Its totient is φ = 742886928.

The previous prime is 928608643. The next prime is 928608701. The reversal of 928608665 is 566806829.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566806829 = 13099 ⋅43271.

It can be written as a sum of positive squares in 2 ways, for example, as 454414489 + 474194176 = 21317^2 + 21776^2 .

It is a cyclic number.

It is not a de Polignac number, because 928608665 - 2²⁰ = 927560089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 92860862 + ... + 92860871.

It is an arithmetic number, because the mean of its divisors is an integer number (278582601).

Almost surely, 2^928608665 is an apocalyptic number.

It is an amenable number.

928608665 is a deficient number, since it is larger than the sum of its proper divisors (185721739).

928608665 is a wasteful number, since it uses less digits than its factorization.

928608665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185721738.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 928608665 is about 30473.0809896210. The cubic root of 928608665 is about 975.6129969428.

The spelling of 928608665 in words is "nine hundred twenty-eight million, six hundred eight thousand, six hundred sixty-five".