2206604905 has 4 divisors (see below), whose sum is σ = 2647925892. Its totient is φ = 1765283920.

The previous prime is 2206604903. The next prime is 2206604929. The reversal of 2206604905 is 5094066022.

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 725278761 + 1481326144 = 26931^2 + 38488^2 .

It is not a de Polignac number, because 2206604905 - 2¹ = 2206604903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2206604903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220660486 + ... + 220660495.

It is an arithmetic number, because the mean of its divisors is an integer number (661981473).

Almost surely, 2^2206604905 is an apocalyptic number.

It is an amenable number.

2206604905 is a deficient number, since it is larger than the sum of its proper divisors (441320987).

2206604905 is an equidigital number, since it uses as much as digits as its factorization.

2206604905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441320986.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2206604905 is about 46974.5133556485. The cubic root of 2206604905 is about 1301.8917045170.

The spelling of 2206604905 in words is "two billion, two hundred six million, six hundred four thousand, nine hundred five".