7997997997 has 12 divisors (see below), whose sum is σ = 9253884640. Its totient is φ = 6888225960.

The previous prime is 7997997977. The next prime is 7997998009.

7997997997 is nontrivially palindromic in base 10.

7997997997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7997997997 - 2¹¹ = 7997995949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7997997997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997997907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1737153 + ... + 1741750.

Almost surely, 2^7997997997 is an apocalyptic number.

It is an amenable number.

7997997997 is a deficient number, since it is larger than the sum of its proper divisors (1255886643).

7997997997 is a wasteful number, since it uses less digits than its factorization.

7997997997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478944 (or 3478933 counting only the distinct ones).

The product of its digits is 1275989841, while the sum is 82.

The square root of 7997997997 is about 89431.5268627345. The cubic root of 7997997997 is about 1999.8331524980.

The spelling of 7997997997 in words is "seven billion, nine hundred ninety-seven million, nine hundred ninety-seven thousand, nine hundred ninety-seven".