928591 has 4 divisors (see below), whose sum is σ = 983232. Its totient is φ = 873952.

The previous prime is 928561. The next prime is 928597. The reversal of 928591 is 195829.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195829 = 113 ⋅1733.

It is a cyclic number.

It is not a de Polignac number, because 928591 - 2⁵ = 928559 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 (928597) 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, 27295 + ... + 27328.

It is an arithmetic number, because the mean of its divisors is an integer number (245808).

2⁹²⁸⁵⁹¹ is an apocalyptic number.

928591 is a deficient number, since it is larger than the sum of its proper divisors (54641).

928591 is a wasteful number, since it uses less digits than its factorization.

928591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54640.

The product of its digits is 6480, while the sum is 34.

The square root of 928591 is about 963.6342667216. The cubic root of 928591 is about 97.5606810514.

The spelling of 928591 in words is "nine hundred twenty-eight thousand, five hundred ninety-one".