998399 has 2 divisors, whose sum is σ = 998400. Its totient is φ = 998398.

The previous prime is 998381. The next prime is 998411. The reversal of 998399 is 993899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998399 - 2¹² = 994303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998329) 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, 499199 + 499200.

It is an arithmetic number, because the mean of its divisors is an integer number (499200).

2⁹⁹⁸³⁹⁹ is an apocalyptic number.

998399 is a deficient number, since it is larger than the sum of its proper divisors (1).

998399 is an equidigital number, since it uses as much as digits as its factorization.

998399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 998399 is about 999.1991793431. The cubic root of 998399 is about 99.9466048280.

The spelling of 998399 in words is "nine hundred ninety-eight thousand, three hundred ninety-nine".