598391 has 4 divisors (see below), whose sum is σ = 624432. Its totient is φ = 572352.

The previous prime is 598387. The next prime is 598399. The reversal of 598391 is 193895.

598391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 598391 - 2² = 598387 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (598399) 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, 12986 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (156108).

2⁵⁹⁸³⁹¹ is an apocalyptic number.

598391 is a deficient number, since it is larger than the sum of its proper divisors (26041).

598391 is a wasteful number, since it uses less digits than its factorization.

598391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040.

The product of its digits is 9720, while the sum is 35.

The square root of 598391 is about 773.5573669742. The cubic root of 598391 is about 84.2678055274.

Subtracting from 598391 its reverse (193895), we obtain a square (404496 = 636²).

It can be divided in two parts, 598 and 391, that added together give a palindrome (989).

The spelling of 598391 in words is "five hundred ninety-eight thousand, three hundred ninety-one".