206789 has 6 divisors (see below), whose sum is σ = 227430. Its totient is φ = 187880.

The previous prime is 206783. The next prime is 206803. The reversal of 206789 is 987602.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 58564 = 385^2 + 242^2 .

It is not a de Polignac number, because 206789 - 2¹² = 202693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 734 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (37905).

2²⁰⁶⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

206789 is a deficient number, since it is larger than the sum of its proper divisors (20641).

206789 is a wasteful number, since it uses less digits than its factorization.

206789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 206789 is about 454.7405853891. The cubic root of 206789 is about 59.1347108622.

The spelling of 206789 in words is "two hundred six thousand, seven hundred eighty-nine".