2093891 has 4 divisors (see below), whose sum is σ = 2096952. Its totient is φ = 2090832.

The previous prime is 2093881. The next prime is 2093893. The reversal of 2093891 is 1983902.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1983902 = 2 ⋅991951.

It is a cyclic number.

It is not a de Polignac number, because 2093891 - 2⁶ = 2093827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2093893) 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, 20 + ... + 2046.

It is an arithmetic number, because the mean of its divisors is an integer number (524238).

2^2093891 is an apocalyptic number.

2093891 is a deficient number, since it is larger than the sum of its proper divisors (3061).

2093891 is a wasteful number, since it uses less digits than its factorization.

2093891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3060.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2093891 is about 1447.0283342077. The cubic root of 2093891 is about 127.9336203672.

The spelling of 2093891 in words is "two million, ninety-three thousand, eight hundred ninety-one".