2081723903 has 4 divisors (see below), whose sum is σ = 2379113040. Its totient is φ = 1784334768.

The previous prime is 2081723879. The next prime is 2081723911. The reversal of 2081723903 is 3093271802.

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 2081723903 - 2¹⁴ = 2081707519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081723603) 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 3 ways as a sum of consecutive naturals, for example, 148694558 + ... + 148694571.

It is an arithmetic number, because the mean of its divisors is an integer number (594778260).

Almost surely, 2^2081723903 is an apocalyptic number.

2081723903 is a deficient number, since it is larger than the sum of its proper divisors (297389137).

2081723903 is an equidigital number, since it uses as much as digits as its factorization.

2081723903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297389136.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2081723903 is about 45625.9126264889. The cubic root of 2081723903 is about 1276.8534168232.

The spelling of 2081723903 in words is "two billion, eighty-one million, seven hundred twenty-three thousand, nine hundred three".