165843 has 6 divisors (see below), whose sum is σ = 239564. Its totient is φ = 110556.

The previous prime is 165833. The next prime is 165857. The reversal of 165843 is 348561.

165843 is a `hidden beast` number, since 1 + 658 + 4 + 3 = 666.

It is not a de Polignac number, because 165843 - 2⁵ = 165811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9205 + ... + 9222.

2¹⁶⁵⁸⁴³ is an apocalyptic number.

165843 is a deficient number, since it is larger than the sum of its proper divisors (73721).

165843 is a wasteful number, since it uses less digits than its factorization.

165843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18433 (or 18430 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 165843 is about 407.2382594993. The cubic root of 165843 is about 54.9413148155.

The spelling of 165843 in words is "one hundred sixty-five thousand, eight hundred forty-three".