2089845209 has 4 divisors (see below), whose sum is σ = 2090023440. Its totient is φ = 2089666980.

The previous prime is 2089845203. The next prime is 2089845217. The reversal of 2089845209 is 9025489802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2089845209 - 2¹² = 2089841113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2089845203) 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, 70187 + ... + 95424.

It is an arithmetic number, because the mean of its divisors is an integer number (522505860).

Almost surely, 2^2089845209 is an apocalyptic number.

It is an amenable number.

2089845209 is a deficient number, since it is larger than the sum of its proper divisors (178231).

2089845209 is a wasteful number, since it uses less digits than its factorization.

2089845209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178230.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 2089845209 is about 45714.8248274014. The cubic root of 2089845209 is about 1278.5116997380.

The spelling of 2089845209 in words is "two billion, eighty-nine million, eight hundred forty-five thousand, two hundred nine".