841891 has 4 divisors (see below), whose sum is σ = 891432. Its totient is φ = 792352.

The previous prime is 841889. The next prime is 841913. The reversal of 841891 is 198148.

841891 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.

It is a cyclic number.

It is not a de Polignac number, because 841891 - 2¹ = 841889 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (841801) 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, 24745 + ... + 24778.

It is an arithmetic number, because the mean of its divisors is an integer number (222858).

2⁸⁴¹⁸⁹¹ is an apocalyptic number.

841891 is a deficient number, since it is larger than the sum of its proper divisors (49541).

841891 is a wasteful number, since it uses less digits than its factorization.

841891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49540.

The product of its digits is 2304, while the sum is 31.

The square root of 841891 is about 917.5461841237. The cubic root of 841891 is about 94.4246293942.

The spelling of 841891 in words is "eight hundred forty-one thousand, eight hundred ninety-one".