581983 has 2 divisors, whose sum is σ = 581984. Its totient is φ = 581982.

The previous prime is 581981. The next prime is 582011. The reversal of 581983 is 389185.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 581983 - 2¹ = 581981 is a prime.

Together with 581981, it forms a pair of twin primes.

581983 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581981) 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 as a sum of consecutive naturals, namely, 290991 + 290992.

It is an arithmetic number, because the mean of its divisors is an integer number (290992).

2⁵⁸¹⁹⁸³ is an apocalyptic number.

581983 is a deficient number, since it is larger than the sum of its proper divisors (1).

581983 is an equidigital number, since it uses as much as digits as its factorization.

581983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 581983 is about 762.8781029758. The cubic root of 581983 is about 83.4904431674.

The spelling of 581983 in words is "five hundred eighty-one thousand, nine hundred eighty-three".