206857 has 8 divisors (see below), whose sum is σ = 244800. Its totient is φ = 171024.

The previous prime is 206827. The next prime is 206879. The reversal of 206857 is 758602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-206857 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (206807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (30600).

2²⁰⁶⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

206857 is a deficient number, since it is larger than the sum of its proper divisors (37943).

206857 is a wasteful number, since it uses less digits than its factorization.

206857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 206857 is about 454.8153471465. The cubic root of 206857 is about 59.1411920574.

The spelling of 206857 in words is "two hundred six thousand, eight hundred fifty-seven".