163801994 has 8 divisors (see below), whose sum is σ = 248663520. Its totient is φ = 80914156.

The previous prime is 163801993. The next prime is 163802017. The reversal of 163801994 is 499108361.

163801994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163801991) 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, 493214 + ... + 493545.

It is an arithmetic number, because the mean of its divisors is an integer number (31082940).

Almost surely, 2^163801994 is an apocalyptic number.

163801994 is a deficient number, since it is larger than the sum of its proper divisors (84861526).

163801994 is an equidigital number, since it uses as much as digits as its factorization.

163801994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986844.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 163801994 is about 12798.5153045187. The cubic root of 163801994 is about 547.1499888925.

The spelling of 163801994 in words is "one hundred sixty-three million, eight hundred one thousand, nine hundred ninety-four".