2089817109 has 24 divisors (see below), whose sum is σ = 3112031832. Its totient is φ = 1350535680.

The previous prime is 2089817047. The next prime is 2089817113. The reversal of 2089817109 is 9017189802.

It can be written as a sum of positive squares in 4 ways, for example, as 132020100 + 1957797009 = 11490^2 + 44247^2 .

It is not a de Polignac number, because 2089817109 - 2¹¹ = 2089815061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2089817909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39897 + ... + 75969.

It is an arithmetic number, because the mean of its divisors is an integer number (129667993).

Almost surely, 2^2089817109 is an apocalyptic number.

It is an amenable number.

2089817109 is a deficient number, since it is larger than the sum of its proper divisors (1022214723).

2089817109 is a wasteful number, since it uses less digits than its factorization.

2089817109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36277 (or 36274 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 2089817109 is about 45714.5174862428. The cubic root of 2089817109 is about 1278.5059694348.

The spelling of 2089817109 in words is "two billion, eighty-nine million, eight hundred seventeen thousand, one hundred nine".