998823 has 8 divisors (see below), whose sum is σ = 1522048. Its totient is φ = 570744.

The previous prime is 998819. The next prime is 998831. The reversal of 998823 is 328899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 998823 - 2² = 998819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998823.

It is not an unprimeable number, because it can be changed into a prime (998813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23761 + ... + 23802.

It is an arithmetic number, because the mean of its divisors is an integer number (190256).

2⁹⁹⁸⁸²³ is an apocalyptic number.

998823 is a deficient number, since it is larger than the sum of its proper divisors (523225).

998823 is a wasteful number, since it uses less digits than its factorization.

998823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47573.

The product of its digits is 31104, while the sum is 39.

The square root of 998823 is about 999.4113267319. The cubic root of 998823 is about 99.9607512640.

It can be divided in two parts, 9988 and 23, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 998823 in words is "nine hundred ninety-eight thousand, eight hundred twenty-three".