998863 has 4 divisors (see below), whose sum is σ = 1000888. Its totient is φ = 996840.

The previous prime is 998861. The next prime is 998897. The reversal of 998863 is 368899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998863 - 2¹ = 998861 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268 + ... + 1438.

It is an arithmetic number, because the mean of its divisors is an integer number (250222).

2⁹⁹⁸⁸⁶³ is an apocalyptic number.

998863 is a deficient number, since it is larger than the sum of its proper divisors (2025).

998863 is a wasteful number, since it uses less digits than its factorization.

998863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024.

The product of its digits is 93312, while the sum is 43.

The square root of 998863 is about 999.4313383119. The cubic root of 998863 is about 99.9620856268.

The spelling of 998863 in words is "nine hundred ninety-eight thousand, eight hundred sixty-three".