2103747817 has 4 divisors (see below), whose sum is σ = 2103861376. Its totient is φ = 2103634260.

The previous prime is 2103747769. The next prime is 2103747853. The reversal of 2103747817 is 7187473012.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2103747817 - 2¹¹ = 2103745769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2103747817.

It is not an unprimeable number, because it can be changed into a prime (2103747857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21813 + ... + 68434.

It is an arithmetic number, because the mean of its divisors is an integer number (525965344).

Almost surely, 2^2103747817 is an apocalyptic number.

It is an amenable number.

2103747817 is a deficient number, since it is larger than the sum of its proper divisors (113559).

2103747817 is an equidigital number, since it uses as much as digits as its factorization.

2103747817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113558.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 2103747817 is about 45866.6307570111. The cubic root of 2103747817 is about 1281.3405180166.

The spelling of 2103747817 in words is "two billion, one hundred three million, seven hundred forty-seven thousand, eight hundred seventeen".