8103181913 has 4 divisors (see below), whose sum is σ = 8291628048. Its totient is φ = 7914735780.

The previous prime is 8103181909. The next prime is 8103181927. The reversal of 8103181913 is 3191813018.

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 8103181913 - 2² = 8103181909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8103181973) 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, 94223003 + ... + 94223088.

It is an arithmetic number, because the mean of its divisors is an integer number (2072907012).

Almost surely, 2^8103181913 is an apocalyptic number.

It is an amenable number.

8103181913 is a deficient number, since it is larger than the sum of its proper divisors (188446135).

8103181913 is a wasteful number, since it uses less digits than its factorization.

8103181913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188446134.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 8103181913 is about 90017.6755587479. The cubic root of 8103181913 is about 2008.5617883390.

The spelling of 8103181913 in words is "eight billion, one hundred three million, one hundred eighty-one thousand, nine hundred thirteen".