138815345 has 8 divisors (see below), whose sum is σ = 167213376. Its totient is φ = 110628976.

The previous prime is 138815333. The next prime is 138815351. The reversal of 138815345 is 543518831.

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 138815345 - 2¹⁸ = 138553201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138815299 and 138815308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51467 + ... + 54096.

It is an arithmetic number, because the mean of its divisors is an integer number (20901672).

Almost surely, 2^138815345 is an apocalyptic number.

It is an amenable number.

138815345 is a deficient number, since it is larger than the sum of its proper divisors (28398031).

138815345 is a wasteful number, since it uses less digits than its factorization.

138815345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105831.

The product of its digits is 57600, while the sum is 38.

The square root of 138815345 is about 11781.9924036642. The cubic root of 138815345 is about 517.7806610022.

The spelling of 138815345 in words is "one hundred thirty-eight million, eight hundred fifteen thousand, three hundred forty-five".