9998000489 has 2 divisors, whose sum is σ = 9998000490. Its totient is φ = 9998000488.

The previous prime is 9998000483. The next prime is 9998000491. The reversal of 9998000489 is 9840008999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9548221225 + 449779264 = 97715^2 + 21208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9998000489 is a prime.

It is a Sophie Germain prime.

Together with 9998000491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9998000483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999000244 + 4999000245.

It is an arithmetic number, because the mean of its divisors is an integer number (4999000245).

Almost surely, 2^9998000489 is an apocalyptic number.

It is an amenable number.

9998000489 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998000489 is an equidigital number, since it uses as much as digits as its factorization.

9998000489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 9998000489 is about 99990.0019451945. The cubic root of 9998000489 is about 2154.2910865982.

The spelling of 9998000489 in words is "nine billion, nine hundred ninety-eight million, four hundred eighty-nine", and thus it is an aban number.