2108144939 has 4 divisors (see below), whose sum is σ = 2108271480. Its totient is φ = 2108018400.

The previous prime is 2108144921. The next prime is 2108144947. The reversal of 2108144939 is 9394418012.

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 2108144939 - 2¹² = 2108140843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2108144896 and 2108144905.

It is not an unprimeable number, because it can be changed into a prime (2108144539) 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, 33662 + ... + 73139.

It is an arithmetic number, because the mean of its divisors is an integer number (527067870).

Almost surely, 2^2108144939 is an apocalyptic number.

2108144939 is a deficient number, since it is larger than the sum of its proper divisors (126541).

2108144939 is a wasteful number, since it uses less digits than its factorization.

2108144939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126540.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 2108144939 is about 45914.5395163667. The cubic root of 2108144939 is about 1282.2326226790.

The spelling of 2108144939 in words is "two billion, one hundred eight million, one hundred forty-four thousand, nine hundred thirty-nine".