998243 has 2 divisors, whose sum is σ = 998244. Its totient is φ = 998242.

The previous prime is 998237. The next prime is 998273. The reversal of 998243 is 342899.

It is a weak prime.

It is an emirp because it is prime and its reverse (342899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998243 - 2¹⁰ = 997219 is a prime.

It is a Sophie Germain prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998243.

It is not a weakly prime, because it can be changed into another prime (998213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499121 + 499122.

It is an arithmetic number, because the mean of its divisors is an integer number (499122).

2⁹⁹⁸²⁴³ is an apocalyptic number.

998243 is a deficient number, since it is larger than the sum of its proper divisors (1).

998243 is an equidigital number, since it uses as much as digits as its factorization.

998243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 998243 is about 999.1211137795. The cubic root of 998243 is about 99.9413989993.

The spelling of 998243 in words is "nine hundred ninety-eight thousand, two hundred forty-three".