138886271 has 4 divisors (see below), whose sum is σ = 142639992. Its totient is φ = 135132552.

The previous prime is 138886261. The next prime is 138886283. The reversal of 138886271 is 172688831.

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 138886271 - 2⁶ = 138886207 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 (138886261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1876805 + ... + 1876878.

It is an arithmetic number, because the mean of its divisors is an integer number (35659998).

Almost surely, 2^138886271 is an apocalyptic number.

138886271 is a deficient number, since it is larger than the sum of its proper divisors (3753721).

138886271 is an equidigital number, since it uses as much as digits as its factorization.

138886271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753720.

The product of its digits is 129024, while the sum is 44.

The square root of 138886271 is about 11785.0019516333. The cubic root of 138886271 is about 517.8688305494.

The spelling of 138886271 in words is "one hundred thirty-eight million, eight hundred eighty-six thousand, two hundred seventy-one".