138845223 has 12 divisors (see below), whose sum is σ = 218786568. Its totient is φ = 84148560.

The previous prime is 138845221. The next prime is 138845261. The reversal of 138845223 is 322548831.

It is not a de Polignac number, because 138845223 - 2¹ = 138845221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138845221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 701140 + ... + 701337.

It is an arithmetic number, because the mean of its divisors is an integer number (18232214).

Almost surely, 2^138845223 is an apocalyptic number.

138845223 is a deficient number, since it is larger than the sum of its proper divisors (79941345).

138845223 is a wasteful number, since it uses less digits than its factorization.

138845223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402494 (or 1402491 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 138845223 is about 11783.2602873738. The cubic root of 138845223 is about 517.8178066093.

The spelling of 138845223 in words is "one hundred thirty-eight million, eight hundred forty-five thousand, two hundred twenty-three".