163994 has 8 divisors (see below), whose sum is σ = 247968. Its totient is φ = 81340.

The previous prime is 163993. The next prime is 163997. The reversal of 163994 is 499361.

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

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 163994.

It is not an unprimeable number, because it can be changed into a prime (163991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (30996).

2¹⁶³⁹⁹⁴ is an apocalyptic number.

163994 is a deficient number, since it is larger than the sum of its proper divisors (83974).

163994 is a wasteful number, since it uses less digits than its factorization.

163994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 5832, while the sum is 32.

The square root of 163994 is about 404.9617265866. The cubic root of 163994 is about 54.7363692150.

The spelling of 163994 in words is "one hundred sixty-three thousand, nine hundred ninety-four".