2103706909 has 2 divisors, whose sum is σ = 2103706910. Its totient is φ = 2103706908.

The previous prime is 2103706907. The next prime is 2103706921. The reversal of 2103706909 is 9096073012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1174981284 + 928725625 = 34278^2 + 30475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103706909 - 2¹ = 2103706907 is a prime.

Together with 2103706907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103706901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051853454 + 1051853455.

It is an arithmetic number, because the mean of its divisors is an integer number (1051853455).

Almost surely, 2^2103706909 is an apocalyptic number.

It is an amenable number.

2103706909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103706909 is an equidigital number, since it uses as much as digits as its factorization.

2103706909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 2103706909 is about 45866.1848097267. The cubic root of 2103706909 is about 1281.3322126140.

The spelling of 2103706909 in words is "two billion, one hundred three million, seven hundred six thousand, nine hundred nine".