138168227 has 4 divisors (see below), whose sum is σ = 138222336. Its totient is φ = 138114120.

The previous prime is 138168223. The next prime is 138168259. The reversal of 138168227 is 722861831.

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

It is a cyclic number.

It is not a de Polignac number, because 138168227 - 2² = 138168223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138168223) 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, 23024 + ... + 28397.

It is an arithmetic number, because the mean of its divisors is an integer number (34555584).

Almost surely, 2^138168227 is an apocalyptic number.

138168227 is a deficient number, since it is larger than the sum of its proper divisors (54109).

138168227 is an equidigital number, since it uses as much as digits as its factorization.

138168227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54108.

The product of its digits is 32256, while the sum is 38.

The square root of 138168227 is about 11754.4981602789. The cubic root of 138168227 is about 516.9748250234.

The spelling of 138168227 in words is "one hundred thirty-eight million, one hundred sixty-eight thousand, two hundred twenty-seven".