998843 has 2 divisors, whose sum is σ = 998844. Its totient is φ = 998842.

The previous prime is 998839. The next prime is 998857. The reversal of 998843 is 348899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998843 - 2² = 998839 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 998843.

It is not a weakly prime, because it can be changed into another prime (998813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499421 + 499422.

It is an arithmetic number, because the mean of its divisors is an integer number (499422).

2⁹⁹⁸⁸⁴³ is an apocalyptic number.

998843 is a deficient number, since it is larger than the sum of its proper divisors (1).

998843 is an equidigital number, since it uses as much as digits as its factorization.

998843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 998843 is about 999.4213325720. The cubic root of 998843 is about 99.9614184499.

The spelling of 998843 in words is "nine hundred ninety-eight thousand, eight hundred forty-three".