2105646379 has 4 divisors (see below), whose sum is σ = 2110443280. Its totient is φ = 2100849480.

The previous prime is 2105646359. The next prime is 2105646391. The reversal of 2105646379 is 9736465012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2105646379 - 2¹⁹ = 2105122091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105646359) 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 in 3 ways as a sum of consecutive naturals, for example, 2397792 + ... + 2398669.

It is an arithmetic number, because the mean of its divisors is an integer number (527610820).

Almost surely, 2^2105646379 is an apocalyptic number.

2105646379 is a deficient number, since it is larger than the sum of its proper divisors (4796901).

2105646379 is an equidigital number, since it uses as much as digits as its factorization.

2105646379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796900.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 2105646379 is about 45887.3226392650. The cubic root of 2105646379 is about 1281.7258577663.

The spelling of 2105646379 in words is "two billion, one hundred five million, six hundred forty-six thousand, three hundred seventy-nine".