138877227 has 16 divisors (see below), whose sum is σ = 207636000. Its totient is φ = 91733472.

The previous prime is 138877223. The next prime is 138877231. The reversal of 138877227 is 722778831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138877223) and next prime (138877231).

It is not a de Polignac number, because 138877227 - 2² = 138877223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138877223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20652 + ... + 26537.

It is an arithmetic number, because the mean of its divisors is an integer number (12977250).

Almost surely, 2^138877227 is an apocalyptic number.

138877227 is a deficient number, since it is larger than the sum of its proper divisors (68758773).

138877227 is a wasteful number, since it uses less digits than its factorization.

138877227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47307 (or 47301 counting only the distinct ones).

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

The square root of 138877227 is about 11784.6182373465. The cubic root of 138877227 is about 517.8575894399.

The spelling of 138877227 in words is "one hundred thirty-eight million, eight hundred seventy-seven thousand, two hundred twenty-seven".