2105770643 has 2 divisors, whose sum is σ = 2105770644. Its totient is φ = 2105770642.

The previous prime is 2105770609. The next prime is 2105770669. The reversal of 2105770643 is 3460775012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2105770643 - 2²⁴ = 2088993427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2105773643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052885321 + 1052885322.

It is an arithmetic number, because the mean of its divisors is an integer number (1052885322).

Almost surely, 2^2105770643 is an apocalyptic number.

2105770643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105770643 is an equidigital number, since it uses as much as digits as its factorization.

2105770643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 2105770643 is about 45888.6766316049. The cubic root of 2105770643 is about 1281.7510708078.

The spelling of 2105770643 in words is "two billion, one hundred five million, seven hundred seventy thousand, six hundred forty-three".