138285117 has 16 divisors (see below), whose sum is σ = 205049280. Its totient is φ = 92108016.

The previous prime is 138285113. The next prime is 138285127. The reversal of 138285117 is 711582831.

138285117 is a `hidden beast` number, since 138 + 2 + 8 + 511 + 7 = 666.

It is not a de Polignac number, because 138285117 - 2² = 138285113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138285113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52803 + ... + 55359.

It is an arithmetic number, because the mean of its divisors is an integer number (12815580).

Almost surely, 2^138285117 is an apocalyptic number.

It is an amenable number.

138285117 is a deficient number, since it is larger than the sum of its proper divisors (66764163).

138285117 is a wasteful number, since it uses less digits than its factorization.

138285117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569 (or 4563 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 138285117 is about 11759.4692482271. The cubic root of 138285117 is about 517.1205704325.

The spelling of 138285117 in words is "one hundred thirty-eight million, two hundred eighty-five thousand, one hundred seventeen".