998080813 has 2 divisors, whose sum is σ = 998080814. Its totient is φ = 998080812.

The previous prime is 998080771. The next prime is 998080817. The reversal of 998080813 is 318080899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987342084 + 10738729 = 31422^2 + 3277^2 .

It is an emirp because it is prime and its reverse (318080899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998080813 - 2⁹ = 998080301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998080817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499040406 + 499040407.

It is an arithmetic number, because the mean of its divisors is an integer number (499040407).

Almost surely, 2^998080813 is an apocalyptic number.

It is an amenable number.

998080813 is a deficient number, since it is larger than the sum of its proper divisors (1).

998080813 is an equidigital number, since it uses as much as digits as its factorization.

998080813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 998080813 is about 31592.4170173793. The cubic root of 998080813 is about 999.3598613099.

The spelling of 998080813 in words is "nine hundred ninety-eight million, eighty thousand, eight hundred thirteen".