998426000917 has 2 divisors, whose sum is σ = 998426000918. Its totient is φ = 998426000916.

The previous prime is 998426000909. The next prime is 998426000953. The reversal of 998426000917 is 719000624899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 761484862161 + 236941138756 = 872631^2 + 486766^2 .

It is a cyclic number.

It is not a de Polignac number, because 998426000917 - 2³ = 998426000909 is a prime.

It is a super-2 number, since 2×998426000917² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998426000317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499213000458 + 499213000459.

It is an arithmetic number, because the mean of its divisors is an integer number (499213000459).

Almost surely, 2^998426000917 is an apocalyptic number.

It is an amenable number.

998426000917 is a deficient number, since it is larger than the sum of its proper divisors (1).

998426000917 is an equidigital number, since it uses as much as digits as its factorization.

998426000917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 998426000917 in words is "nine hundred ninety-eight billion, four hundred twenty-six million, nine hundred seventeen", and thus it is an aban number.