205867 has 4 divisors (see below), whose sum is σ = 207616. Its totient is φ = 204120.

The previous prime is 205847. The next prime is 205879. The reversal of 205867 is 768502.

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 205867 - 2¹⁵ = 173099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205817) 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, 684 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (51904).

2²⁰⁵⁸⁶⁷ is an apocalyptic number.

205867 is a deficient number, since it is larger than the sum of its proper divisors (1749).

205867 is a wasteful number, since it uses less digits than its factorization.

205867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748.

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

The square root of 205867 is about 453.7256880539. The cubic root of 205867 is about 59.0466929041.

The spelling of 205867 in words is "two hundred five thousand, eight hundred sixty-seven".