898591 has 4 divisors (see below), whose sum is σ = 913384. Its totient is φ = 883800.

The previous prime is 898561. The next prime is 898607. The reversal of 898591 is 195898.

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 898591 - 2¹¹ = 896543 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 (898561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7305 + ... + 7426.

It is an arithmetic number, because the mean of its divisors is an integer number (228346).

2⁸⁹⁸⁵⁹¹ is an apocalyptic number.

898591 is a deficient number, since it is larger than the sum of its proper divisors (14793).

898591 is a wasteful number, since it uses less digits than its factorization.

898591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14792.

The product of its digits is 25920, while the sum is 40.

The square root of 898591 is about 947.9403989703. The cubic root of 898591 is about 96.4985279022.

The spelling of 898591 in words is "eight hundred ninety-eight thousand, five hundred ninety-one".