9998199487 has 2 divisors, whose sum is σ = 9998199488. Its totient is φ = 9998199486.

The previous prime is 9998199439. The next prime is 9998199493. The reversal of 9998199487 is 7849918999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9998199487 - 2¹⁹ = 9997675199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9998199427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999099743 + 4999099744.

It is an arithmetic number, because the mean of its divisors is an integer number (4999099744).

Almost surely, 2^9998199487 is an apocalyptic number.

9998199487 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998199487 is an equidigital number, since it uses as much as digits as its factorization.

9998199487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105815808, while the sum is 73.

The square root of 9998199487 is about 99990.9970297326. The cubic root of 9998199487 is about 2154.3053793485.

The spelling of 9998199487 in words is "nine billion, nine hundred ninety-eight million, one hundred ninety-nine thousand, four hundred eighty-seven".