998583 has 8 divisors (see below), whose sum is σ = 1401600. Its totient is φ = 630648.

The previous prime is 998561. The next prime is 998617. The reversal of 998583 is 385899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998583 - 2⁵ = 998551 is a prime.

998583 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998583.

It is not an unprimeable number, because it can be changed into a prime (998513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8703 + ... + 8816.

It is an arithmetic number, because the mean of its divisors is an integer number (175200).

2⁹⁹⁸⁵⁸³ is an apocalyptic number.

998583 is a deficient number, since it is larger than the sum of its proper divisors (403017).

998583 is a wasteful number, since it uses less digits than its factorization.

998583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17541.

The product of its digits is 77760, while the sum is 42.

The square root of 998583 is about 999.2912488359. The cubic root of 998583 is about 99.9527443392.

The spelling of 998583 in words is "nine hundred ninety-eight thousand, five hundred eighty-three".