690589 has 2 divisors, whose sum is σ = 690590. Its totient is φ = 690588.

The previous prime is 690583. The next prime is 690607. The reversal of 690589 is 985096.

690589 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., 632025 + 58564 = 795^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 690589 - 2¹⁹ = 166301 is a prime.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345294 + 345295.

It is an arithmetic number, because the mean of its divisors is an integer number (345295).

2⁶⁹⁰⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

690589 is a deficient number, since it is larger than the sum of its proper divisors (1).

690589 is an equidigital number, since it uses as much as digits as its factorization.

690589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 690589 is about 831.0168470013. The cubic root of 690589 is about 88.3906957032.

The spelling of 690589 in words is "six hundred ninety thousand, five hundred eighty-nine".