2109202847 has 4 divisors (see below), whose sum is σ = 2158254120. Its totient is φ = 2060151576.

The previous prime is 2109202829. The next prime is 2109202861. The reversal of 2109202847 is 7482029012.

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

It is a cyclic number.

It is not a de Polignac number, because 2109202847 - 2⁶ = 2109202783 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 (2109202247) 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, 24525572 + ... + 24525657.

It is an arithmetic number, because the mean of its divisors is an integer number (539563530).

Almost surely, 2^2109202847 is an apocalyptic number.

2109202847 is a deficient number, since it is larger than the sum of its proper divisors (49051273).

2109202847 is an equidigital number, since it uses as much as digits as its factorization.

2109202847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49051272.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 2109202847 is about 45926.0584744652. The cubic root of 2109202847 is about 1282.4470698744.

The spelling of 2109202847 in words is "two billion, one hundred nine million, two hundred two thousand, eight hundred forty-seven".