630589 has 2 divisors, whose sum is σ = 630590. Its totient is φ = 630588.

The previous prime is 630587. The next prime is 630593. The reversal of 630589 is 985036.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319225 + 311364 = 565^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 630589 - 2¹ = 630587 is a prime.

Together with 630587, it forms a pair of twin primes.

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

It is a self number, because there is not a number n which added to its sum of digits gives 630589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315294 + 315295.

It is an arithmetic number, because the mean of its divisors is an integer number (315295).

2⁶³⁰⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

630589 is a deficient number, since it is larger than the sum of its proper divisors (1).

630589 is an equidigital number, since it uses as much as digits as its factorization.

630589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 630589 is about 794.0963417621. The cubic root of 630589 is about 85.7528962294.

The spelling of 630589 in words is "six hundred thirty thousand, five hundred eighty-nine".