138417547 has 4 divisors (see below), whose sum is σ = 138469240. Its totient is φ = 138365856.

The previous prime is 138417457. The next prime is 138417569. The reversal of 138417547 is 745714831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138417547 - 2¹¹ = 138415499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138417577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21597 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (34617310).

Almost surely, 2^138417547 is an apocalyptic number.

138417547 is a deficient number, since it is larger than the sum of its proper divisors (51693).

138417547 is an equidigital number, since it uses as much as digits as its factorization.

138417547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51692.

The product of its digits is 94080, while the sum is 40.

The square root of 138417547 is about 11765.0986821191. The cubic root of 138417547 is about 517.2855928378.

The spelling of 138417547 in words is "one hundred thirty-eight million, four hundred seventeen thousand, five hundred forty-seven".