581397 has 4 divisors (see below), whose sum is σ = 775200. Its totient is φ = 387596.

The previous prime is 581393. The next prime is 581407. The reversal of 581397 is 793185.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 581397 - 2² = 581393 is a prime.

It is a D-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 581397.

It is not an unprimeable number, because it can be changed into a prime (581393) 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, 96897 + ... + 96902.

It is an arithmetic number, because the mean of its divisors is an integer number (193800).

2⁵⁸¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

581397 is a deficient number, since it is larger than the sum of its proper divisors (193803).

581397 is a wasteful number, since it uses less digits than its factorization.

581397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193802.

The product of its digits is 7560, while the sum is 33.

The square root of 581397 is about 762.4939344021. The cubic root of 581397 is about 83.4624115182.

The spelling of 581397 in words is "five hundred eighty-one thousand, three hundred ninety-seven".