618589 has 2 divisors, whose sum is σ = 618590. Its totient is φ = 618588.

The previous prime is 618587. The next prime is 618593. The reversal of 618589 is 985816.

618589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466489 + 152100 = 683^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 618589 - 2¹ = 618587 is a prime.

Together with 618587, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309294 + 309295.

It is an arithmetic number, because the mean of its divisors is an integer number (309295).

2⁶¹⁸⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

618589 is a deficient number, since it is larger than the sum of its proper divisors (1).

618589 is an equidigital number, since it uses as much as digits as its factorization.

618589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 37.

The square root of 618589 is about 786.5042911517. The cubic root of 618589 is about 85.2054545502.

The spelling of 618589 in words is "six hundred eighteen thousand, five hundred eighty-nine".