2107308809 has 4 divisors (see below), whose sum is σ = 2179974660. Its totient is φ = 2034642960.

The previous prime is 2107308799. The next prime is 2107308817. The reversal of 2107308809 is 9088037012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 652649209 + 1454659600 = 25547^2 + 38140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2107308809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2107308839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36332882 + ... + 36332939.

It is an arithmetic number, because the mean of its divisors is an integer number (544993665).

Almost surely, 2^2107308809 is an apocalyptic number.

2107308809 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2107308809 is a deficient number, since it is larger than the sum of its proper divisors (72665851).

2107308809 is an equidigital number, since it uses as much as digits as its factorization.

2107308809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72665850.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 2107308809 is about 45905.4333276574. The cubic root of 2107308809 is about 1282.0630810575.

The spelling of 2107308809 in words is "two billion, one hundred seven million, three hundred eight thousand, eight hundred nine".