8191973384 has 16 divisors (see below), whose sum is σ = 17554228800. Its totient is φ = 3510845712.

The previous prime is 8191973381. The next prime is 8191973423. The reversal of 8191973384 is 4833791918.

It is a super-2 number, since 2×8191973384² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8191973381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73142564 + ... + 73142675.

It is an arithmetic number, because the mean of its divisors is an integer number (1097139300).

Almost surely, 2^8191973384 is an apocalyptic number.

It is an amenable number.

8191973384 is an abundant number, since it is smaller than the sum of its proper divisors (9362255416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8191973384 is a wasteful number, since it uses less digits than its factorization.

8191973384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146285252 (or 146285248 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The square root of 8191973384 is about 90509.5209577423. The cubic root of 8191973384 is about 2015.8714966225.

The spelling of 8191973384 in words is "eight billion, one hundred ninety-one million, nine hundred seventy-three thousand, three hundred eighty-four".