8159993 has 2 divisors, whose sum is σ = 8159994. Its totient is φ = 8159992.

The previous prime is 8159971. The next prime is 8160011. The reversal of 8159993 is 3999518.

8159993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7997584 + 162409 = 2828^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 8159993 - 2¹² = 8155897 is a prime.

It is not a weakly prime, because it can be changed into another prime (8159923) 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 as a sum of consecutive naturals, namely, 4079996 + 4079997.

It is an arithmetic number, because the mean of its divisors is an integer number (4079997).

Almost surely, 2^8159993 is an apocalyptic number.

It is an amenable number.

8159993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8159993 is an equidigital number, since it uses as much as digits as its factorization.

8159993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 44.

The square root of 8159993 is about 2856.5701461718. The cubic root of 8159993 is about 201.3244843437.

The spelling of 8159993 in words is "eight million, one hundred fifty-nine thousand, nine hundred ninety-three".