2105771959 has 2 divisors, whose sum is σ = 2105771960. Its totient is φ = 2105771958.

The previous prime is 2105771953. The next prime is 2105772029. The reversal of 2105771959 is 9591775012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2105771959 - 2²⁷ = 1971554231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105771953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052885979 + 1052885980.

It is an arithmetic number, because the mean of its divisors is an integer number (1052885980).

Almost surely, 2^2105771959 is an apocalyptic number.

2105771959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105771959 is an equidigital number, since it uses as much as digits as its factorization.

2105771959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 46.

The square root of 2105771959 is about 45888.6909706520. The cubic root of 2105771959 is about 1281.7513378176.

The spelling of 2105771959 in words is "two billion, one hundred five million, seven hundred seventy-one thousand, nine hundred fifty-nine".