138680379 has 6 divisors (see below), whose sum is σ = 200316116. Its totient is φ = 92453580.

The previous prime is 138680369. The next prime is 138680387. The reversal of 138680379 is 973086831.

It is a happy number.

It is not a de Polignac number, because 138680379 - 2⁷ = 138680251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138680309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7704457 + ... + 7704474.

Almost surely, 2^138680379 is an apocalyptic number.

138680379 is a deficient number, since it is larger than the sum of its proper divisors (61635737).

138680379 is a wasteful number, since it uses less digits than its factorization.

138680379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15408937 (or 15408934 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 138680379 is about 11776.2633717152. The cubic root of 138680379 is about 517.6127990480.

The spelling of 138680379 in words is "one hundred thirty-eight million, six hundred eighty thousand, three hundred seventy-nine".