206743 has 4 divisors (see below), whose sum is σ = 209440. Its totient is φ = 204048.

The previous prime is 206699. The next prime is 206749. The reversal of 206743 is 347602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206743 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 (206749) 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, 1230 + ... + 1387.

It is an arithmetic number, because the mean of its divisors is an integer number (52360).

2²⁰⁶⁷⁴³ is an apocalyptic number.

206743 is a deficient number, since it is larger than the sum of its proper divisors (2697).

206743 is an equidigital number, since it uses as much as digits as its factorization.

206743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 206743 is about 454.6900042886. The cubic root of 206743 is about 59.1303257185.

It can be divided in two parts, 206 and 743, that added together give a palindrome (949).

The spelling of 206743 in words is "two hundred six thousand, seven hundred forty-three".