206573 has 4 divisors (see below), whose sum is σ = 207648. Its totient is φ = 205500.

The previous prime is 206551. The next prime is 206593. The reversal of 206573 is 375602.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 206573 - 2¹⁰ = 205549 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 (206543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161 + ... + 662.

It is an arithmetic number, because the mean of its divisors is an integer number (51912).

2²⁰⁶⁵⁷³ is an apocalyptic number.

It is an amenable number.

206573 is a deficient number, since it is larger than the sum of its proper divisors (1075).

206573 is an equidigital number, since it uses as much as digits as its factorization.

206573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 206573 is about 454.5030252925. The cubic root of 206573 is about 59.1141141066.

The spelling of 206573 in words is "two hundred six thousand, five hundred seventy-three".