138759715 has 8 divisors (see below), whose sum is σ = 167349600. Its totient is φ = 110449152.

The previous prime is 138759701. The next prime is 138759721. The reversal of 138759715 is 517957831.

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 138759715 - 2¹¹ = 138757667 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68734 + ... + 70723.

It is an arithmetic number, because the mean of its divisors is an integer number (20918700).

Almost surely, 2^138759715 is an apocalyptic number.

138759715 is a deficient number, since it is larger than the sum of its proper divisors (28589885).

138759715 is a wasteful number, since it uses less digits than its factorization.

138759715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139661.

The product of its digits is 264600, while the sum is 46.

The square root of 138759715 is about 11779.6313609552. The cubic root of 138759715 is about 517.7114852042.

The spelling of 138759715 in words is "one hundred thirty-eight million, seven hundred fifty-nine thousand, seven hundred fifteen".