8163988399 has 16 divisors (see below), whose sum is σ = 9429177600. Its totient is φ = 6923689344.

The previous prime is 8163988397. The next prime is 8163988411. The reversal of 8163988399 is 9938893618.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8163988399 - 2¹ = 8163988397 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 8163988399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8163988397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637047 + ... + 649735.

It is an arithmetic number, because the mean of its divisors is an integer number (589323600).

Almost surely, 2^8163988399 is an apocalyptic number.

8163988399 is a deficient number, since it is larger than the sum of its proper divisors (1265189201).

8163988399 is a wasteful number, since it uses less digits than its factorization.

8163988399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13662.

The product of its digits is 20155392, while the sum is 64.

The square root of 8163988399 is about 90354.7917877076. The cubic root of 8163988399 is about 2013.5733732929.

The spelling of 8163988399 in words is "eight billion, one hundred sixty-three million, nine hundred eighty-eight thousand, three hundred ninety-nine".