998727899 has 12 divisors (see below), whose sum is σ = 1111381488. Its totient is φ = 892152720.

The previous prime is 998727889. The next prime is 998727907.

998727899 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-998727899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998727889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27479 + ... + 52464.

It is an arithmetic number, because the mean of its divisors is an integer number (92615124).

Almost surely, 2^998727899 is an apocalyptic number.

998727899 is a deficient number, since it is larger than the sum of its proper divisors (112653589).

998727899 is a wasteful number, since it uses less digits than its factorization.

998727899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80018 (or 79987 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 68.

The square root of 998727899 is about 31602.6565180840. The cubic root of 998727899 is about 999.5757864016.

The spelling of 998727899 in words is "nine hundred ninety-eight million, seven hundred twenty-seven thousand, eight hundred ninety-nine".