8000007997 has 2 divisors, whose sum is σ = 8000007998. Its totient is φ = 8000007996.

The previous prime is 8000007989. The next prime is 8000008111. The reversal of 8000007997 is 7997000008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6964069401 + 1035938596 = 83451^2 + 32186^2 .

It is a cyclic number.

It is not a de Polignac number, because 8000007997 - 2³ = 8000007989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8000007907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000003998 + 4000003999.

It is an arithmetic number, because the mean of its divisors is an integer number (4000003999).

Almost surely, 2^8000007997 is an apocalyptic number.

It is an amenable number.

8000007997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000007997 is an equidigital number, since it uses as much as digits as its factorization.

8000007997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 8000007997 is about 89442.7638045695. The cubic root of 8000007997 is about 2000.0006664164. Note that the first 3 decimals are identical.

The spelling of 8000007997 in words is "eight billion, seven thousand, nine hundred ninety-seven".