583981 has 2 divisors, whose sum is σ = 583982. Its totient is φ = 583980.

The previous prime is 583969. The next prime is 583991. The reversal of 583981 is 189385.

583981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324900 + 259081 = 570^2 + 509^2 .

It is a cyclic number.

It is not a de Polignac number, because 583981 - 2⁷ = 583853 is a prime.

It is a super-2 number, since 2×583981² = 682067616722, which contains 22 as substring.

583981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (583991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291990 + 291991.

It is an arithmetic number, because the mean of its divisors is an integer number (291991).

2⁵⁸³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

583981 is a deficient number, since it is larger than the sum of its proper divisors (1).

583981 is an equidigital number, since it uses as much as digits as its factorization.

583981 is an evil number, because the sum of its binary digits is even.

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

The square root of 583981 is about 764.1864955624. The cubic root of 583981 is about 83.5858774401.

The spelling of 583981 in words is "five hundred eighty-three thousand, nine hundred eighty-one".