2105889 has 4 divisors (see below), whose sum is σ = 2807856. Its totient is φ = 1403924.

The previous prime is 2105881. The next prime is 2105891. The reversal of 2105889 is 9885012.

It is a happy number.

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 2105889 - 2³ = 2105881 is a prime.

It is a D-number.

2105889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2105881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350979 + ... + 350984.

It is an arithmetic number, because the mean of its divisors is an integer number (701964).

2^2105889 is an apocalyptic number.

It is an amenable number.

2105889 is a deficient number, since it is larger than the sum of its proper divisors (701967).

2105889 is an equidigital number, since it uses as much as digits as its factorization.

2105889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701966.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 2105889 is about 1451.1681501466. The cubic root of 2105889 is about 128.1775084403.

The spelling of 2105889 in words is "two million, one hundred five thousand, eight hundred eighty-nine".