138379709 has 8 divisors (see below), whose sum is σ = 149859360. Its totient is φ = 127019376.

The previous prime is 138379699. The next prime is 138379729. The reversal of 138379709 is 907973831.

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 138379709 - 2¹⁶ = 138314173 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 (138379729) 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, 27407 + ... + 32060.

It is an arithmetic number, because the mean of its divisors is an integer number (18732420).

Almost surely, 2^138379709 is an apocalyptic number.

It is an amenable number.

138379709 is a deficient number, since it is larger than the sum of its proper divisors (11479651).

138379709 is a wasteful number, since it uses less digits than its factorization.

138379709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59659.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 138379709 is about 11763.4905108985. The cubic root of 138379709 is about 517.2384532555.

The spelling of 138379709 in words is "one hundred thirty-eight million, three hundred seventy-nine thousand, seven hundred nine".