138027161 has 8 divisors (see below), whose sum is σ = 139341384. Its totient is φ = 136719360.

The previous prime is 138027143. The next prime is 138027167. The reversal of 138027161 is 161720831.

It can be written as a sum of positive squares in 4 ways, for example, as 2421136 + 135606025 = 1556^2 + 11645^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138027161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138027167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48761 + ... + 51513.

It is an arithmetic number, because the mean of its divisors is an integer number (17417673).

Almost surely, 2^138027161 is an apocalyptic number.

It is an amenable number.

138027161 is a deficient number, since it is larger than the sum of its proper divisors (1314223).

138027161 is a wasteful number, since it uses less digits than its factorization.

138027161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3211.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 138027161 is about 11748.4961165249. The cubic root of 138027161 is about 516.7988260368.

Adding to 138027161 its reverse (161720831), we get a palindrome (299747992).

The spelling of 138027161 in words is "one hundred thirty-eight million, twenty-seven thousand, one hundred sixty-one".