9998873309 has 2 divisors, whose sum is σ = 9998873310. Its totient is φ = 9998873308.

The previous prime is 9998873293. The next prime is 9998873321. The reversal of 9998873309 is 9033788999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6327725209 + 3671148100 = 79547^2 + 60590^2 .

It is an emirp because it is prime and its reverse (9033788999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9998873309 - 2⁴ = 9998873293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998873009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999436654 + 4999436655.

It is an arithmetic number, because the mean of its divisors is an integer number (4999436655).

Almost surely, 2^9998873309 is an apocalyptic number.

It is an amenable number.

9998873309 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998873309 is an equidigital number, since it uses as much as digits as its factorization.

9998873309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 65.

The square root of 9998873309 is about 99994.3663863120. The cubic root of 9998873309 is about 2154.3537742537.

The spelling of 9998873309 in words is "nine billion, nine hundred ninety-eight million, eight hundred seventy-three thousand, three hundred nine".