168199930 has 8 divisors (see below), whose sum is σ = 302759892. Its totient is φ = 67279968.

The previous prime is 168199907. The next prime is 168199937. The reversal of 168199930 is 39991861.

It can be written as a sum of positive squares in 2 ways, for example, as 166952241 + 1247689 = 12921^2 + 1117^2 .

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

It is not an unprimeable number, because it can be changed into a prime (168199937) 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, 8409987 + ... + 8410006.

Almost surely, 2^168199930 is an apocalyptic number.

168199930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168199930 is a deficient number, since it is larger than the sum of its proper divisors (134559962).

168199930 is a wasteful number, since it uses less digits than its factorization.

168199930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16820000.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 168199930 is about 12969.1915707958. The cubic root of 168199930 is about 552.0036341041.

The spelling of 168199930 in words is "one hundred sixty-eight million, one hundred ninety-nine thousand, nine hundred thirty".