983891 has 4 divisors (see below), whose sum is σ = 992712. Its totient is φ = 975072.

The previous prime is 983881. The next prime is 983911. The reversal of 983891 is 198389.

983891 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 an emirpimes, since its reverse is a distinct semiprime: 198389 = 29 ⋅6841.

It is a cyclic number.

It is not a de Polignac number, because 983891 - 2¹⁰ = 982867 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 983891.

It is not an unprimeable number, because it can be changed into a prime (983861) 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, 4241 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (248178).

2⁹⁸³⁸⁹¹ is an apocalyptic number.

983891 is a deficient number, since it is larger than the sum of its proper divisors (8821).

983891 is a wasteful number, since it uses less digits than its factorization.

983891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820.

The product of its digits is 15552, while the sum is 38.

The square root of 983891 is about 991.9127985866. The cubic root of 983891 is about 99.4601239167.

The spelling of 983891 in words is "nine hundred eighty-three thousand, eight hundred ninety-one".