206863 has 4 divisors (see below), whose sum is σ = 213568. Its totient is φ = 200160.

The previous prime is 206827. The next prime is 206879. The reversal of 206863 is 368602.

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

It is a cyclic number.

It is not a de Polignac number, because 206863 - 2⁹ = 206351 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9 and base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206803) 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, 3306 + ... + 3367.

It is an arithmetic number, because the mean of its divisors is an integer number (53392).

2²⁰⁶⁸⁶³ is an apocalyptic number.

206863 is a deficient number, since it is larger than the sum of its proper divisors (6705).

206863 is an equidigital number, since it uses as much as digits as its factorization.

206863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 206863 is about 454.8219431822. The cubic root of 206863 is about 59.1417638594.

The spelling of 206863 in words is "two hundred six thousand, eight hundred sixty-three".