9998199499 has 2 divisors, whose sum is σ = 9998199500. Its totient is φ = 9998199498.

The previous prime is 9998199493. The next prime is 9998199517. The reversal of 9998199499 is 9949918999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9998199499 - 2⁷ = 9998199371 is a prime.

It is not a weakly prime, because it can be changed into another prime (9998199493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999099749 + 4999099750.

It is an arithmetic number, because the mean of its divisors is an integer number (4999099750).

Almost surely, 2^9998199499 is an apocalyptic number.

9998199499 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998199499 is an equidigital number, since it uses as much as digits as its factorization.

9998199499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153055008, while the sum is 76.

The square root of 9998199499 is about 99990.9970897380. The cubic root of 9998199499 is about 2154.3053802104.

The spelling of 9998199499 in words is "nine billion, nine hundred ninety-eight million, one hundred ninety-nine thousand, four hundred ninety-nine".