138787227 has 6 divisors (see below), whose sum is σ = 200470452. Its totient is φ = 92524812.

The previous prime is 138787219. The next prime is 138787331. The reversal of 138787227 is 722787831.

It is a happy number.

138787227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138787227 - 2³ = 138787219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138787927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7710393 + ... + 7710410.

It is an arithmetic number, because the mean of its divisors is an integer number (33411742).

Almost surely, 2^138787227 is an apocalyptic number.

138787227 is a deficient number, since it is larger than the sum of its proper divisors (61683225).

138787227 is a wasteful number, since it uses less digits than its factorization.

138787227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15420809 (or 15420806 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 138787227 is about 11780.7990815564. The cubic root of 138787227 is about 517.7456986337.

The spelling of 138787227 in words is "one hundred thirty-eight million, seven hundred eighty-seven thousand, two hundred twenty-seven".