2107798909 has 8 divisors (see below), whose sum is σ = 2181193560. Its totient is φ = 2034451776.

The previous prime is 2107798871. The next prime is 2107798933. The reversal of 2107798909 is 9098977012.

It can be written as a sum of positive squares in 4 ways, for example, as 36638809 + 2071160100 = 6053^2 + 45510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2107798909 - 2¹¹ = 2107796861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2107798949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94719 + ... + 114835.

It is an arithmetic number, because the mean of its divisors is an integer number (272649195).

Almost surely, 2^2107798909 is an apocalyptic number.

2107798909 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2107798909 is a deficient number, since it is larger than the sum of its proper divisors (73394651).

2107798909 is a wasteful number, since it uses less digits than its factorization.

2107798909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23759.

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 2107798909 is about 45910.7711653812. The cubic root of 2107798909 is about 1282.1624638039.

The spelling of 2107798909 in words is "two billion, one hundred seven million, seven hundred ninety-eight thousand, nine hundred nine".