163439994 has 16 divisors (see below), whose sum is σ = 327006720. Its totient is φ = 54458880.

The previous prime is 163439987. The next prime is 163439999. The reversal of 163439994 is 499934361.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163439999) 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, 23847 + ... + 29925.

It is an arithmetic number, because the mean of its divisors is an integer number (20437920).

Almost surely, 2^163439994 is an apocalyptic number.

163439994 is an abundant number, since it is smaller than the sum of its proper divisors (163566726).

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

163439994 is a wasteful number, since it uses less digits than its factorization.

163439994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565.

The product of its digits is 629856, while the sum is 48.

The square root of 163439994 is about 12784.3652169359. The cubic root of 163439994 is about 546.7466271265.

The spelling of 163439994 in words is "one hundred sixty-three million, four hundred thirty-nine thousand, nine hundred ninety-four".