138385629 has 6 divisors (see below), whose sum is σ = 199890366. Its totient is φ = 92257080.

The previous prime is 138385613. The next prime is 138385631. The reversal of 138385629 is 926583831.

It is a happy number.

138385629 is a `hidden beast` number, since 1 + 3 + 83 + 8 + 562 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 132020100 + 6365529 = 11490^2 + 2523^2 .

It is not a de Polignac number, because 138385629 - 2⁴ = 138385613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138385679) 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, 7688082 + ... + 7688099.

It is an arithmetic number, because the mean of its divisors is an integer number (33315061).

Almost surely, 2^138385629 is an apocalyptic number.

It is an amenable number.

138385629 is a deficient number, since it is larger than the sum of its proper divisors (61504737).

138385629 is a wasteful number, since it uses less digits than its factorization.

138385629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15376187 (or 15376184 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 138385629 is about 11763.7421342020. The cubic root of 138385629 is about 517.2458291153.

The spelling of 138385629 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, six hundred twenty-nine".