163899 has 6 divisors (see below), whose sum is σ = 236756. Its totient is φ = 109260.

The previous prime is 163883. The next prime is 163901. The reversal of 163899 is 998361.

It is not a de Polignac number, because 163899 - 2⁴ = 163883 is a prime.

It is a Duffinian number.

163899 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (163819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9097 + ... + 9114.

2¹⁶³⁸⁹⁹ is an apocalyptic number.

163899 is a deficient number, since it is larger than the sum of its proper divisors (72857).

163899 is a wasteful number, since it uses less digits than its factorization.

163899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18217 (or 18214 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 163899 is about 404.8444145595. The cubic root of 163899 is about 54.7257977724.

The spelling of 163899 in words is "one hundred sixty-three thousand, eight hundred ninety-nine".