890641 has 4 divisors (see below), whose sum is σ = 899392. Its totient is φ = 881892.

The previous prime is 890609. The next prime is 890653. The reversal of 890641 is 146098.

890641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 890641 - 2⁵ = 890609 is a prime.

It is a Duffinian number.

890641 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890671) 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, 4221 + ... + 4426.

It is an arithmetic number, because the mean of its divisors is an integer number (224848).

2⁸⁹⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

890641 is a deficient number, since it is larger than the sum of its proper divisors (8751).

890641 is a wasteful number, since it uses less digits than its factorization.

890641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8750.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 890641 is about 943.7377813779. The cubic root of 890641 is about 96.2131044283.

The spelling of 890641 in words is "eight hundred ninety thousand, six hundred forty-one".