890443 has 4 divisors (see below), whose sum is σ = 942840. Its totient is φ = 838048.

The previous prime is 890441. The next prime is 890459. The reversal of 890443 is 344098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344098 = 2 ⋅172049.

It is a cyclic number.

It is not a de Polignac number, because 890443 - 2¹ = 890441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890441) 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, 26173 + ... + 26206.

It is an arithmetic number, because the mean of its divisors is an integer number (235710).

2⁸⁹⁰⁴⁴³ is an apocalyptic number.

890443 is a deficient number, since it is larger than the sum of its proper divisors (52397).

890443 is a wasteful number, since it uses less digits than its factorization.

890443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52396.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 890443 is about 943.6328735266. The cubic root of 890443 is about 96.2059741306.

The spelling of 890443 in words is "eight hundred ninety thousand, four hundred forty-three".