8099999993 has 2 divisors, whose sum is σ = 8099999994. Its totient is φ = 8099999992.

The previous prime is 8099999989. The next prime is 8100000023. The reversal of 8099999993 is 3999999908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5357068864 + 2742931129 = 73192^2 + 52373^2 .

It is a cyclic number.

It is not a de Polignac number, because 8099999993 - 2² = 8099999989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8099999993.

It is not a weakly prime, because it can be changed into another prime (8099999933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4049999996 + 4049999997.

It is an arithmetic number, because the mean of its divisors is an integer number (4049999997).

Almost surely, 2^8099999993 is an apocalyptic number.

It is an amenable number.

8099999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8099999993 is an equidigital number, since it uses as much as digits as its factorization.

8099999993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114791256, while the sum is 74.

The square root of 8099999993 is about 89999.9999611111. Note that the first 4 decimals coincide. The cubic root of 8099999993 is about 2008.2988496680.

The spelling of 8099999993 in words is "eight billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".