163998954 has 48 divisors (see below), whose sum is σ = 408215808. Its totient is φ = 46611936.

The previous prime is 163998941. The next prime is 163998971. The reversal of 163998954 is 459899361.

It is a self number, because there is not a number n which added to its sum of digits gives 163998954.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21519 + ... + 28125.

It is an arithmetic number, because the mean of its divisors is an integer number (8504496).

Almost surely, 2^163998954 is an apocalyptic number.

163998954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163998954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204107904).

163998954 is an abundant number, since it is smaller than the sum of its proper divisors (244216854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163998954 is a wasteful number, since it uses less digits than its factorization.

163998954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819 (or 6816 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 163998954 is about 12806.2076353618. The cubic root of 163998954 is about 547.3692037591.

The spelling of 163998954 in words is "one hundred sixty-three million, nine hundred ninety-eight thousand, nine hundred fifty-four".