7988998897 has 4 divisors (see below), whose sum is σ = 8715271536. Its totient is φ = 7262726260.

The previous prime is 7988998889. The next prime is 7988998903.

7988998897 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7988998897 - 2³ = 7988998889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7988998897.

It is not an unprimeable number, because it can be changed into a prime (7988992897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363136303 + ... + 363136324.

It is an arithmetic number, because the mean of its divisors is an integer number (2178817884).

Almost surely, 2^7988998897 is an apocalyptic number.

It is an amenable number.

7988998897 is a deficient number, since it is larger than the sum of its proper divisors (726272639).

7988998897 is a wasteful number, since it uses less digits than its factorization.

7988998897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726272638.

The product of its digits is 1316818944, while the sum is 82.

The square root of 7988998897 is about 89381.1999080344. The cubic root of 7988998897 is about 1999.0828208722.

The spelling of 7988998897 in words is "seven billion, nine hundred eighty-eight million, nine hundred ninety-eight thousand, eight hundred ninety-seven".