206589 has 4 divisors (see below), whose sum is σ = 275456. Its totient is φ = 137724.

The previous prime is 206551. The next prime is 206593. The reversal of 206589 is 985602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 206589 - 2⁷ = 206461 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206589.

It is not an unprimeable number, because it can be changed into a prime (206519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34429 + ... + 34434.

It is an arithmetic number, because the mean of its divisors is an integer number (68864).

2²⁰⁶⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

206589 is a deficient number, since it is larger than the sum of its proper divisors (68867).

206589 is an equidigital number, since it uses as much as digits as its factorization.

206589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68866.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 206589 is about 454.5206265947. The cubic root of 206589 is about 59.1156402844.

The spelling of 206589 in words is "two hundred six thousand, five hundred eighty-nine".