581863 has 2 divisors, whose sum is σ = 581864. Its totient is φ = 581862.

The previous prime is 581857. The next prime is 581869. The reversal of 581863 is 368185.

581863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (581857) and next prime (581869).

It is a cyclic number.

It is not a de Polignac number, because 581863 - 2⁹ = 581351 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290931 + 290932.

It is an arithmetic number, because the mean of its divisors is an integer number (290932).

2⁵⁸¹⁸⁶³ is an apocalyptic number.

581863 is a deficient number, since it is larger than the sum of its proper divisors (1).

581863 is an equidigital number, since it uses as much as digits as its factorization.

581863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 31.

The square root of 581863 is about 762.7994493968. The cubic root of 581863 is about 83.4847044306.

It can be divided in two parts, 581 and 863, that added together give a square (1444 = 38²).

The spelling of 581863 in words is "five hundred eighty-one thousand, eight hundred sixty-three".