168421996 has 12 divisors (see below), whose sum is σ = 298469920. Its totient is φ = 83144880.

The previous prime is 168421993. The next prime is 168422017. The reversal of 168421996 is 699124861.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (168421993) by changing a digit.

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, 266175 + ... + 266806.

Almost surely, 2^168421996 is an apocalyptic number.

It is an amenable number.

168421996 is a deficient number, since it is larger than the sum of its proper divisors (130047924).

168421996 is a wasteful number, since it uses less digits than its factorization.

168421996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533064 (or 533062 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 168421996 is about 12977.7500361195. The cubic root of 168421996 is about 552.2464549197.

The spelling of 168421996 in words is "one hundred sixty-eight million, four hundred twenty-one thousand, nine hundred ninety-six".