2108705 has 4 divisors (see below), whose sum is σ = 2530452. Its totient is φ = 1686960.

The previous prime is 2108699. The next prime is 2108723. The reversal of 2108705 is 5078012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1106704 + 1002001 = 1052^2 + 1001^2 .

It is not a de Polignac number, because 2108705 - 2⁶ = 2108641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210866 + ... + 210875.

It is an arithmetic number, because the mean of its divisors is an integer number (632613).

2^2108705 is an apocalyptic number.

It is an amenable number.

2108705 is a deficient number, since it is larger than the sum of its proper divisors (421747).

2108705 is an equidigital number, since it uses as much as digits as its factorization.

2108705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421746.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2108705 is about 1452.1380788341. The cubic root of 2108705 is about 128.2346160872.

The spelling of 2108705 in words is "two million, one hundred eight thousand, seven hundred five".