185489 has 4 divisors (see below), whose sum is σ = 186480. Its totient is φ = 184500.

The previous prime is 185483. The next prime is 185491. The reversal of 185489 is 984581.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 185489 - 2⁸ = 185233 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (185483) 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, 119 + ... + 620.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2¹⁸⁵⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

185489 is a deficient number, since it is larger than the sum of its proper divisors (991).

185489 is an equidigital number, since it uses as much as digits as its factorization.

185489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990.

The product of its digits is 11520, while the sum is 35.

The square root of 185489 is about 430.6843391627. The cubic root of 185489 is about 57.0303521533.

The spelling of 185489 in words is "one hundred eighty-five thousand, four hundred eighty-nine".