138320207 has 8 divisors (see below), whose sum is σ = 142942800. Its totient is φ = 133761600.

The previous prime is 138320197. The next prime is 138320213. The reversal of 138320207 is 702023831.

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

It is a cyclic number.

It is not a de Polignac number, because 138320207 - 2¹² = 138316111 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 (138320257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11582 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (17867850).

Almost surely, 2^138320207 is an apocalyptic number.

138320207 is a deficient number, since it is larger than the sum of its proper divisors (4622593).

138320207 is a wasteful number, since it uses less digits than its factorization.

138320207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31993.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 138320207 is about 11760.9611426958. The cubic root of 138320207 is about 517.1643067038.

The spelling of 138320207 in words is "one hundred thirty-eight million, three hundred twenty thousand, two hundred seven".