98999819309 has 2 divisors, whose sum is σ = 98999819310. Its totient is φ = 98999819308.

The previous prime is 98999819231. The next prime is 98999819351. The reversal of 98999819309 is 90391899989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61826822500 + 37172996809 = 248650^2 + 192803^2 .

It is a cyclic number.

It is not a de Polignac number, because 98999819309 - 2³² = 94704852013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98999819389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49499909654 + 49499909655.

It is an arithmetic number, because the mean of its divisors is an integer number (49499909655).

Almost surely, 2^98999819309 is an apocalyptic number.

It is an amenable number.

98999819309 is a deficient number, since it is larger than the sum of its proper divisors (1).

98999819309 is an equidigital number, since it uses as much as digits as its factorization.

98999819309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102036672, while the sum is 74.

The spelling of 98999819309 in words is "ninety-eight billion, nine hundred ninety-nine million, eight hundred nineteen thousand, three hundred nine".