138036717 has 80 divisors (see below), whose sum is σ = 258788992. Its totient is φ = 71383680.

The previous prime is 138036671. The next prime is 138036733. The reversal of 138036717 is 717630831.

138036717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138036717 - 2¹⁸ = 137774573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138036737) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 449478 + ... + 449784.

Almost surely, 2^138036717 is an apocalyptic number.

It is an amenable number.

138036717 is a deficient number, since it is larger than the sum of its proper divisors (120752275).

138036717 is a wasteful number, since it uses less digits than its factorization.

138036717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 138036717 is about 11748.9027998362. The cubic root of 138036717 is about 516.8107522297.

The spelling of 138036717 in words is "one hundred thirty-eight million, thirty-six thousand, seven hundred seventeen".