2005939 has 4 divisors (see below), whose sum is σ = 2160256. Its totient is φ = 1851624.

The previous prime is 2005937. The next prime is 2005943. The reversal of 2005939 is 9395002.

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 2005939 - 2¹ = 2005937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005931) 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, 77139 + ... + 77164.

It is an arithmetic number, because the mean of its divisors is an integer number (540064).

2^2005939 is an apocalyptic number.

2005939 is a deficient number, since it is larger than the sum of its proper divisors (154317).

2005939 is a wasteful number, since it uses less digits than its factorization.

2005939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154316.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 2005939 is about 1416.3117594654. The cubic root of 2005939 is about 126.1166929347.

The spelling of 2005939 in words is "two million, five thousand, nine hundred thirty-nine".