2105279905 has 8 divisors (see below), whose sum is σ = 2607830784. Its totient is φ = 1629894000.

The previous prime is 2105279903. The next prime is 2105279941. The reversal of 2105279905 is 5099725012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2105279905 - 2¹ = 2105279903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105279903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6791071 + ... + 6791380.

It is an arithmetic number, because the mean of its divisors is an integer number (325978848).

Almost surely, 2^2105279905 is an apocalyptic number.

It is an amenable number.

2105279905 is a deficient number, since it is larger than the sum of its proper divisors (502550879).

2105279905 is a wasteful number, since it uses less digits than its factorization.

2105279905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582487.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 2105279905 is about 45883.3292710980. The cubic root of 2105279905 is about 1281.6514947805.

The spelling of 2105279905 in words is "two billion, one hundred five million, two hundred seventy-nine thousand, nine hundred five".