138372206 has 8 divisors (see below), whose sum is σ = 237209520. Its totient is φ = 59302368.

The previous prime is 138372187. The next prime is 138372211. The reversal of 138372206 is 602273831.

It is a happy number.

138372206 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4941851 + ... + 4941878.

It is an arithmetic number, because the mean of its divisors is an integer number (29651190).

Almost surely, 2^138372206 is an apocalyptic number.

138372206 is a deficient number, since it is larger than the sum of its proper divisors (98837314).

138372206 is an equidigital number, since it uses as much as digits as its factorization.

138372206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883738.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 138372206 is about 11763.1715961300. The cubic root of 138372206 is about 517.2291047986.

The spelling of 138372206 in words is "one hundred thirty-eight million, three hundred seventy-two thousand, two hundred six".