2089908449 has 2 divisors, whose sum is σ = 2089908450. Its totient is φ = 2089908448.

The previous prime is 2089908433. The next prime is 2089908451. The reversal of 2089908449 is 9448099802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1853733025 + 236175424 = 43055^2 + 15368^2 .

It is a cyclic number.

It is not a de Polignac number, because 2089908449 - 2⁴ = 2089908433 is a prime.

It is a Sophie Germain prime.

Together with 2089908451, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2089908449.

It is not a weakly prime, because it can be changed into another prime (2089908479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044954224 + 1044954225.

It is an arithmetic number, because the mean of its divisors is an integer number (1044954225).

Almost surely, 2^2089908449 is an apocalyptic number.

It is an amenable number.

2089908449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2089908449 is an equidigital number, since it uses as much as digits as its factorization.

2089908449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 2089908449 is about 45715.5165015118. The cubic root of 2089908449 is about 1278.5245957911.

The spelling of 2089908449 in words is "two billion, eighty-nine million, nine hundred eight thousand, four hundred forty-nine".