185389 has 4 divisors (see below), whose sum is σ = 188224. Its totient is φ = 182556.

The previous prime is 185371. The next prime is 185401. The reversal of 185389 is 983581.

185389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185309) 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, 1317 + ... + 1450.

It is an arithmetic number, because the mean of its divisors is an integer number (47056).

2¹⁸⁵³⁸⁹ is an apocalyptic number.

It is an amenable number.

185389 is a deficient number, since it is larger than the sum of its proper divisors (2835).

185389 is an equidigital number, since it uses as much as digits as its factorization.

185389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834.

The product of its digits is 8640, while the sum is 34.

The square root of 185389 is about 430.5682292042. The cubic root of 185389 is about 57.0201016615.

The spelling of 185389 in words is "one hundred eighty-five thousand, three hundred eighty-nine".