138863547 has 6 divisors (see below), whose sum is σ = 200580692. Its totient is φ = 92575692.

The previous prime is 138863519. The next prime is 138863567. The reversal of 138863547 is 745368831.

138863547 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 635 + 4 + 7 = 666.

It is not a de Polignac number, because 138863547 - 2¹⁹ = 138339259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138863507) 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, 7714633 + ... + 7714650.

Almost surely, 2^138863547 is an apocalyptic number.

138863547 is a deficient number, since it is larger than the sum of its proper divisors (61717145).

138863547 is a wasteful number, since it uses less digits than its factorization.

138863547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15429289 (or 15429286 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 138863547 is about 11784.0378054383. The cubic root of 138863547 is about 517.8405851534.

The spelling of 138863547 in words is "one hundred thirty-eight million, eight hundred sixty-three thousand, five hundred forty-seven".