2005865323 has 24 divisors (see below), whose sum is σ = 2627610624. Its totient is φ = 1512579600.

The previous prime is 2005865299. The next prime is 2005865371. The reversal of 2005865323 is 3235685002.

It is a happy number.

It is not a de Polignac number, because 2005865323 - 2⁹ = 2005864811 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005865023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43315 + ... + 76732.

It is an arithmetic number, because the mean of its divisors is an integer number (109483776).

Almost surely, 2^2005865323 is an apocalyptic number.

2005865323 is a deficient number, since it is larger than the sum of its proper divisors (621745301).

2005865323 is a wasteful number, since it uses less digits than its factorization.

2005865323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120103 (or 120096 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2005865323 is about 44786.8878467794. The cubic root of 2005865323 is about 1261.1514885096.

The spelling of 2005865323 in words is "two billion, five million, eight hundred sixty-five thousand, three hundred twenty-three".