890189 has 4 divisors (see below), whose sum is σ = 892320. Its totient is φ = 888060.

The previous prime is 890177. The next prime is 890221. The reversal of 890189 is 981098.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 981098 = 2 ⋅490549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890189 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (223080).

2⁸⁹⁰¹⁸⁹ is an apocalyptic number.

It is an amenable number.

890189 is a deficient number, since it is larger than the sum of its proper divisors (2131).

890189 is a wasteful number, since it uses less digits than its factorization.

890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 890189 is about 943.4982776879. The cubic root of 890189 is about 96.1968256351.

Subtracting 890189 from its reverse (981098), we obtain a palindrome (90909).

The spelling of 890189 in words is "eight hundred ninety thousand, one hundred eighty-nine".