998499143 has 2 divisors, whose sum is σ = 998499144. Its totient is φ = 998499142.

The previous prime is 998499041. The next prime is 998499157. The reversal of 998499143 is 341994899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998499143 - 2¹⁴ = 998482759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998499163) 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 as a sum of consecutive naturals, namely, 499249571 + 499249572.

It is an arithmetic number, because the mean of its divisors is an integer number (499249572).

Almost surely, 2^998499143 is an apocalyptic number.

998499143 is a deficient number, since it is larger than the sum of its proper divisors (1).

998499143 is an equidigital number, since it uses as much as digits as its factorization.

998499143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 998499143 is about 31599.0370581130. The cubic root of 998499143 is about 999.4994638387.

The spelling of 998499143 in words is "nine hundred ninety-eight million, four hundred ninety-nine thousand, one hundred forty-three".