8998558997 has 2 divisors, whose sum is σ = 8998558998. Its totient is φ = 8998558996.

The previous prime is 8998558967. The next prime is 8998558999. The reversal of 8998558997 is 7998558998.

8998558997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7535802481 + 1462756516 = 86809^2 + 38246^2 .

It is a cyclic number.

It is not a de Polignac number, because 8998558997 - 2²⁰ = 8997510421 is a prime.

Together with 8998558999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8998558999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4499279498 + 4499279499.

It is an arithmetic number, because the mean of its divisors is an integer number (4499279499).

Almost surely, 2^8998558997 is an apocalyptic number.

It is an amenable number.

8998558997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8998558997 is an equidigital number, since it uses as much as digits as its factorization.

8998558997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 587865600, while the sum is 77.

The square root of 8998558997 is about 94860.7347483668. The cubic root of 8998558997 is about 2079.9728020513.

Subtracting from 8998558997 its reverse (7998558998), we obtain a palindrome (999999999).

The spelling of 8998558997 in words is "eight billion, nine hundred ninety-eight million, five hundred fifty-eight thousand, nine hundred ninety-seven".