978583 has 4 divisors (see below), whose sum is σ = 980920. Its totient is φ = 976248.

The previous prime is 978569. The next prime is 978599. The reversal of 978583 is 385879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 385879 = 13 ⋅29683.

It is a cyclic number.

It is not a de Polignac number, because 978583 - 2⁹ = 978071 is a prime.

It is a Duffinian number.

978583 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978283) 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, 348 + ... + 1441.

It is an arithmetic number, because the mean of its divisors is an integer number (245230).

2⁹⁷⁸⁵⁸³ is an apocalyptic number.

978583 is a deficient number, since it is larger than the sum of its proper divisors (2337).

978583 is a wasteful number, since it uses less digits than its factorization.

978583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 60480, while the sum is 40.

The square root of 978583 is about 989.2335416877. The cubic root of 978583 is about 99.2809419480.

Subtracting from 978583 its reverse (385879), we obtain a cube (592704 = 84³).

The spelling of 978583 in words is "nine hundred seventy-eight thousand, five hundred eighty-three".