581423 has 4 divisors (see below), whose sum is σ = 583800. Its totient is φ = 579048.

The previous prime is 581411. The next prime is 581429. The reversal of 581423 is 324185.

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 581423 - 2⁴ = 581407 is a prime.

It is a Duffinian 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 581423.

It is not an unprimeable number, because it can be changed into a prime (581429) 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, 773 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (145950).

2⁵⁸¹⁴²³ is an apocalyptic number.

581423 is a deficient number, since it is larger than the sum of its proper divisors (2377).

581423 is a wasteful number, since it uses less digits than its factorization.

581423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376.

The product of its digits is 960, while the sum is 23.

The square root of 581423 is about 762.5109835275. The cubic root of 581423 is about 83.4636556425.

The spelling of 581423 in words is "five hundred eighty-one thousand, four hundred twenty-three".