581879 has 4 divisors (see below), whose sum is σ = 591480. Its totient is φ = 572280.

The previous prime is 581873. The next prime is 581891. The reversal of 581879 is 978185.

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 581879 - 2⁴ = 581863 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 (581873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4709 + ... + 4830.

It is an arithmetic number, because the mean of its divisors is an integer number (147870).

2⁵⁸¹⁸⁷⁹ is an apocalyptic number.

581879 is a deficient number, since it is larger than the sum of its proper divisors (9601).

581879 is an equidigital number, since it uses as much as digits as its factorization.

581879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9600.

The product of its digits is 20160, while the sum is 38.

The square root of 581879 is about 762.8099370092. The cubic root of 581879 is about 83.4854696411.

The spelling of 581879 in words is "five hundred eighty-one thousand, eight hundred seventy-nine".