138366207 has 12 divisors (see below), whose sum is σ = 228414160. Its totient is φ = 79066368.

The previous prime is 138366203. The next prime is 138366223. The reversal of 138366207 is 702663831.

It is a happy number.

It is not a de Polignac number, because 138366207 - 2² = 138366203 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 (138366203) 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, 1098082 + ... + 1098207.

Almost surely, 2^138366207 is an apocalyptic number.

138366207 is a deficient number, since it is larger than the sum of its proper divisors (90047953).

138366207 is a wasteful number, since it uses less digits than its factorization.

138366207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196302 (or 2196299 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 138366207 is about 11762.9166026118. The cubic root of 138366207 is about 517.2216300262.

The spelling of 138366207 in words is "one hundred thirty-eight million, three hundred sixty-six thousand, two hundred seven".