138825387 has 8 divisors (see below), whose sum is σ = 205667280. Its totient is φ = 92550240.

The previous prime is 138825373. The next prime is 138825397. The reversal of 138825387 is 783528831.

138825387 is a `hidden beast` number, since 1 + 38 + 82 + 538 + 7 = 666.

It is not a de Polignac number, because 138825387 - 2⁷ = 138825259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138825317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2570814 + ... + 2570867.

It is an arithmetic number, because the mean of its divisors is an integer number (25708410).

Almost surely, 2^138825387 is an apocalyptic number.

138825387 is a deficient number, since it is larger than the sum of its proper divisors (66841893).

138825387 is an equidigital number, since it uses as much as digits as its factorization.

138825387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141690 (or 5141684 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 138825387 is about 11782.4185547790. The cubic root of 138825387 is about 517.7931462406.

The spelling of 138825387 in words is "one hundred thirty-eight million, eight hundred twenty-five thousand, three hundred eighty-seven".