183861 has 12 divisors (see below), whose sum is σ = 274560. Its totient is φ = 118440.

The previous prime is 183829. The next prime is 183871. The reversal of 183861 is 168381.

It is not a de Polignac number, because 183861 - 2⁵ = 183829 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 183861.

It is not an unprimeable number, because it can be changed into a prime (183871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51 + ... + 608.

It is an arithmetic number, because the mean of its divisors is an integer number (22880).

2¹⁸³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

183861 is a deficient number, since it is larger than the sum of its proper divisors (90699).

183861 is a wasteful number, since it uses less digits than its factorization.

183861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 693 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 183861 is about 428.7901584692. The cubic root of 183861 is about 56.8630136154.

The spelling of 183861 in words is "one hundred eighty-three thousand, eight hundred sixty-one".