689589 has 12 divisors (see below), whose sum is σ = 1003756. Its totient is φ = 456192.

The previous prime is 689587. The next prime is 689597. The reversal of 689589 is 985986.

689589 is a `hidden beast` number, since 68 + 9 + 589 = 666.

689589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 378225 = 558^2 + 615^2 .

It is not a de Polignac number, because 689589 - 2¹ = 689587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1539 + ... + 1935.

2⁶⁸⁹⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

689589 is a deficient number, since it is larger than the sum of its proper divisors (314167).

689589 is a wasteful number, since it uses less digits than its factorization.

689589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 593 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 689589 is about 830.4149565127. The cubic root of 689589 is about 88.3480106935.

The spelling of 689589 in words is "six hundred eighty-nine thousand, five hundred eighty-nine".