168683994 has 24 divisors (see below), whose sum is σ = 366331680. Its totient is φ = 56097288.

The previous prime is 168683993. The next prime is 168684011. The reversal of 168683994 is 499386861.

It is a self number, because there is not a number n which added to its sum of digits gives 168683994.

It is not an unprimeable number, because it can be changed into a prime (168683993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2772 + ... + 18575.

It is an arithmetic number, because the mean of its divisors is an integer number (15263820).

Almost surely, 2^168683994 is an apocalyptic number.

168683994 is an abundant number, since it is smaller than the sum of its proper divisors (197647686).

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

168683994 is a wasteful number, since it uses less digits than its factorization.

168683994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21794 (or 21791 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 168683994 is about 12987.8402361594. The cubic root of 168683994 is about 552.5326655680.

The spelling of 168683994 in words is "one hundred sixty-eight million, six hundred eighty-three thousand, nine hundred ninety-four".