189005 has 8 divisors (see below), whose sum is σ = 229632. Its totient is φ = 149328.

The previous prime is 188999. The next prime is 189011. The reversal of 189005 is 500981.

189005 = 250² + 251² + 252².

189005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (188999) and next prime (189011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189005 - 2⁶ = 188941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332 + ... + 698.

It is an arithmetic number, because the mean of its divisors is an integer number (28704).

2¹⁸⁹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

189005 is a deficient number, since it is larger than the sum of its proper divisors (40627).

189005 is a wasteful number, since it uses less digits than its factorization.

189005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475.

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

The square root of 189005 is about 434.7470528940. The cubic root of 189005 is about 57.3884415452.

Adding to 189005 its reverse (500981), we get a palindrome (689986).

The spelling of 189005 in words is "one hundred eighty-nine thousand, five".