2208137809 has 2 divisors, whose sum is σ = 2208137810. Its totient is φ = 2208137808.

The previous prime is 2208137797. The next prime is 2208137819. The reversal of 2208137809 is 9087318022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1248067584 + 960070225 = 35328^2 + 30985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2208137809 - 2⁵ = 2208137777 is a prime.

It is not a weakly prime, because it can be changed into another prime (2208137819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104068904 + 1104068905.

It is an arithmetic number, because the mean of its divisors is an integer number (1104068905).

Almost surely, 2^2208137809 is an apocalyptic number.

It is an amenable number.

2208137809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2208137809 is an equidigital number, since it uses as much as digits as its factorization.

2208137809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 2208137809 is about 46990.8268601437. The cubic root of 2208137809 is about 1302.1931046530.

The spelling of 2208137809 in words is "two billion, two hundred eight million, one hundred thirty-seven thousand, eight hundred nine".