8111384009 has 4 divisors (see below), whose sum is σ = 8111565204. Its totient is φ = 8111202816.

The previous prime is 8111383979. The next prime is 8111384027. The reversal of 8111384009 is 9004831118.

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 4700473600 + 3410910409 = 68560^2 + 58403^2 .

It is a cyclic number.

It is not a de Polignac number, because 8111384009 - 2²⁰ = 8110335433 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 8111384009.

It is not an unprimeable number, because it can be changed into a prime (8111314009) 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, 30569 + ... + 130985.

It is an arithmetic number, because the mean of its divisors is an integer number (2027891301).

Almost surely, 2^8111384009 is an apocalyptic number.

It is an amenable number.

8111384009 is a deficient number, since it is larger than the sum of its proper divisors (181195).

8111384009 is a wasteful number, since it uses less digits than its factorization.

8111384009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181194.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 8111384009 is about 90063.2222885679. Note that the first 4 decimals coincide. The cubic root of 8111384009 is about 2009.2392531260.

The spelling of 8111384009 in words is "eight billion, one hundred eleven million, three hundred eighty-four thousand, nine".