998019 has 24 divisors (see below), whose sum is σ = 1667952. Its totient is φ = 568320.

The previous prime is 998017. The next prime is 998027. The reversal of 998019 is 910899.

It is not a de Polignac number, because 998019 - 2¹ = 998017 is a prime.

It is a super-2 number, since 2×998019² = 1992083848722, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998019.

It is not an unprimeable number, because it can be changed into a prime (998017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1387 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (69498).

2⁹⁹⁸⁰¹⁹ is an apocalyptic number.

998019 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

998019 is a deficient number, since it is larger than the sum of its proper divisors (669933).

998019 is a wasteful number, since it uses less digits than its factorization.

998019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 998019 is about 999.0090089684. The cubic root of 998019 is about 99.9339230146.

It can be divided in two parts, 9980 and 19, that added together give a palindrome (9999).

The spelling of 998019 in words is "nine hundred ninety-eight thousand, nineteen".