168105994 has 16 divisors (see below), whose sum is σ = 297478656. Its totient is φ = 69721200.

The previous prime is 168105989. The next prime is 168106033. The reversal of 168105994 is 499501861.

It is a self number, because there is not a number n which added to its sum of digits gives 168105994.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193237 + ... + 194104.

It is an arithmetic number, because the mean of its divisors is an integer number (18592416).

Almost surely, 2^168105994 is an apocalyptic number.

168105994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

168105994 is a deficient number, since it is larger than the sum of its proper divisors (129372662).

168105994 is a wasteful number, since it uses less digits than its factorization.

168105994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387381.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 168105994 is about 12965.5695594139. The cubic root of 168105994 is about 551.9008542965.

The spelling of 168105994 in words is "one hundred sixty-eight million, one hundred five thousand, nine hundred ninety-four".