168138183 has 4 divisors (see below), whose sum is σ = 224184248. Its totient is φ = 112092120.

The previous prime is 168138167. The next prime is 168138193. The reversal of 168138183 is 381831861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 168138183 - 2⁴ = 168138167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168138133) 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, 28023028 + ... + 28023033.

It is an arithmetic number, because the mean of its divisors is an integer number (56046062).

Almost surely, 2^168138183 is an apocalyptic number.

168138183 is a deficient number, since it is larger than the sum of its proper divisors (56046065).

168138183 is an equidigital number, since it uses as much as digits as its factorization.

168138183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56046064.

The product of its digits is 27648, while the sum is 39.

The square root of 168138183 is about 12966.8108261052. The cubic root of 168138183 is about 551.9360781106.

The spelling of 168138183 in words is "one hundred sixty-eight million, one hundred thirty-eight thousand, one hundred eighty-three".