2105708513 has 2 divisors, whose sum is σ = 2105708514. Its totient is φ = 2105708512.

The previous prime is 2105708503. The next prime is 2105708639. The reversal of 2105708513 is 3158075012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1554961489 + 550747024 = 39433^2 + 23468^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105708513 - 2¹⁴ = 2105692129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2105708513.

It is not a weakly prime, because it can be changed into another prime (2105708503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052854256 + 1052854257.

It is an arithmetic number, because the mean of its divisors is an integer number (1052854257).

Almost surely, 2^2105708513 is an apocalyptic number.

It is an amenable number.

2105708513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105708513 is an equidigital number, since it uses as much as digits as its factorization.

2105708513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 2105708513 is about 45887.9996622211. Note that the first 3 decimals coincide. The cubic root of 2105708513 is about 1281.7384648169.

The spelling of 2105708513 in words is "two billion, one hundred five million, seven hundred eight thousand, five hundred thirteen".