138006647 has 8 divisors (see below), whose sum is σ = 146725344. Its totient is φ = 129514528.

The previous prime is 138006619. The next prime is 138006683. The reversal of 138006647 is 746600831.

138006647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138006647 - 2¹² = 138002551 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 (138006047) 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, 55388 + ... + 57825.

It is an arithmetic number, because the mean of its divisors is an integer number (18340668).

Almost surely, 2^138006647 is an apocalyptic number.

138006647 is a deficient number, since it is larger than the sum of its proper divisors (8718697).

138006647 is a wasteful number, since it uses less digits than its factorization.

138006647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113289.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 138006647 is about 11747.6230361720. The cubic root of 138006647 is about 516.7732220511.

The spelling of 138006647 in words is "one hundred thirty-eight million, six thousand, six hundred forty-seven".