168123994 has 8 divisors (see below), whose sum is σ = 254683188. Its totient is φ = 83229600.

The previous prime is 168123979. The next prime is 168124013. The reversal of 168123994 is 499321861.

It is a happy number.

168123994 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133749225 + 34374769 = 11565^2 + 5863^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 168123994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415947 + ... + 416350.

Almost surely, 2^168123994 is an apocalyptic number.

168123994 is a deficient number, since it is larger than the sum of its proper divisors (86559194).

168123994 is a wasteful number, since it uses less digits than its factorization.

168123994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832400.

The product of its digits is 93312, while the sum is 43.

The square root of 168123994 is about 12966.2636869686. The cubic root of 168123994 is about 551.9205519103.

The spelling of 168123994 in words is "one hundred sixty-eight million, one hundred twenty-three thousand, nine hundred ninety-four".