8443993161 has 8 divisors (see below), whose sum is σ = 11259087840. Its totient is φ = 5629113632.

The previous prime is 8443993141. The next prime is 8443993189. The reversal of 8443993161 is 1613993448.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8443993161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8443993161.

It is not an unprimeable number, because it can be changed into a prime (8443993141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103501 + ... + 166133.

It is an arithmetic number, because the mean of its divisors is an integer number (1407385980).

Almost surely, 2^8443993161 is an apocalyptic number.

It is an amenable number.

8443993161 is a deficient number, since it is larger than the sum of its proper divisors (2815094679).

8443993161 is a wasteful number, since it uses less digits than its factorization.

8443993161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107575.

The product of its digits is 559872, while the sum is 48.

The square root of 8443993161 is about 91891.2028488038. The cubic root of 8443993161 is about 2036.3353052265.

The spelling of 8443993161 in words is "eight billion, four hundred forty-three million, nine hundred ninety-three thousand, one hundred sixty-one".