890891 has 4 divisors (see below), whose sum is σ = 937800. Its totient is φ = 843984.

The previous prime is 890887. The next prime is 890893. The reversal of 890891 is 198098.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 890891 - 2² = 890887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (890893) 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, 23426 + ... + 23463.

It is an arithmetic number, because the mean of its divisors is an integer number (234450).

2⁸⁹⁰⁸⁹¹ is an apocalyptic number.

890891 is a deficient number, since it is larger than the sum of its proper divisors (46909).

890891 is a wasteful number, since it uses less digits than its factorization.

890891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46908.

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

The square root of 890891 is about 943.8702241304. The cubic root of 890891 is about 96.2221058202. Note that the first 3 decimals are identical.

The spelling of 890891 in words is "eight hundred ninety thousand, eight hundred ninety-one".