2105388913 has 2 divisors, whose sum is σ = 2105388914. Its totient is φ = 2105388912.

The previous prime is 2105388899. The next prime is 2105388931. The reversal of 2105388913 is 3198835012.

Together with next prime (2105388931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2104332129 + 1056784 = 45873^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105388913 - 2¹⁷ = 2105257841 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105388013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052694456 + 1052694457.

It is an arithmetic number, because the mean of its divisors is an integer number (1052694457).

Almost surely, 2^2105388913 is an apocalyptic number.

It is an amenable number.

2105388913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105388913 is an equidigital number, since it uses as much as digits as its factorization.

2105388913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2105388913 is about 45884.5171381371. The cubic root of 2105388913 is about 1281.6736150149.

The spelling of 2105388913 in words is "two billion, one hundred five million, three hundred eighty-eight thousand, nine hundred thirteen".