185009 has 8 divisors (see below), whose sum is σ = 204960. Its totient is φ = 166980.

The previous prime is 184999. The next prime is 185021. The reversal of 185009 is 900581.

185009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 185009 - 2⁴ = 184993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185069) 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, 1262 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (25620).

2¹⁸⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

185009 is a deficient number, since it is larger than the sum of its proper divisors (19951).

185009 is an equidigital number, since it uses as much as digits as its factorization.

185009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 185009 is about 430.1267255124. The cubic root of 185009 is about 56.9811161412.

The spelling of 185009 in words is "one hundred eighty-five thousand, nine".