9998163 has 24 divisors (see below), whose sum is σ = 16630016. Its totient is φ = 5670000.

The previous prime is 9998147. The next prime is 9998173. The reversal of 9998163 is 3618999.

9998163 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9998163 - 2⁴ = 9998147 is a prime.

It is a Duffinian number.

9998163 is strictly pandigital in base 8.

9998163 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9998143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8988 + ... + 10038.

Almost surely, 2^9998163 is an apocalyptic number.

9998163 is a deficient number, since it is larger than the sum of its proper divisors (6631853).

9998163 is a wasteful number, since it uses less digits than its factorization.

9998163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1212 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9998163 is about 3161.9871916249. The cubic root of 9998163 is about 215.4302758735.

The spelling of 9998163 in words is "nine million, nine hundred ninety-eight thousand, one hundred sixty-three".