8000399993 has 2 divisors, whose sum is σ = 8000399994. Its totient is φ = 8000399992.

The previous prime is 8000399947. The next prime is 8000400007. The reversal of 8000399993 is 3999930008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4872458809 + 3127941184 = 69803^2 + 55928^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000399993 - 2²⁶ = 7933291129 is a prime.

It is not a weakly prime, because it can be changed into another prime (8000399923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000199996 + 4000199997.

It is an arithmetic number, because the mean of its divisors is an integer number (4000199997).

Almost surely, 2^8000399993 is an apocalyptic number.

It is an amenable number.

8000399993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000399993 is an equidigital number, since it uses as much as digits as its factorization.

8000399993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 50.

The square root of 8000399993 is about 89444.9551008887. The cubic root of 8000399993 is about 2000.0333321945.

The spelling of 8000399993 in words is "eight billion, three hundred ninety-nine thousand, nine hundred ninety-three".