989863 has 8 divisors (see below), whose sum is σ = 1159200. Its totient is φ = 827520.

The previous prime is 989839. The next prime is 989869. The reversal of 989863 is 368989.

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

It is a cyclic number.

It is not a de Polignac number, because 989863 - 2⁵ = 989831 is a prime.

989863 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989869) 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, 1438 + ... + 2011.

It is an arithmetic number, because the mean of its divisors is an integer number (144900).

2⁹⁸⁹⁸⁶³ is an apocalyptic number.

989863 is a deficient number, since it is larger than the sum of its proper divisors (169337).

989863 is a wasteful number, since it uses less digits than its factorization.

989863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497.

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

The square root of 989863 is about 994.9185896343. The cubic root of 989863 is about 99.6609517621.

It can be divided in two parts, 98986 and 3, that added together give a palindrome (98989).

The spelling of 989863 in words is "nine hundred eighty-nine thousand, eight hundred sixty-three".