138584605 has 8 divisors (see below), whose sum is σ = 166870872. Its totient is φ = 110488128.

The previous prime is 138584603. The next prime is 138584627. The reversal of 138584605 is 506485831.

It can be written as a sum of positive squares in 4 ways, for example, as 83557881 + 55026724 = 9141^2 + 7418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138584605 - 2¹ = 138584603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138584603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45834 + ... + 48763.

It is an arithmetic number, because the mean of its divisors is an integer number (20858859).

Almost surely, 2^138584605 is an apocalyptic number.

It is an amenable number.

138584605 is a deficient number, since it is larger than the sum of its proper divisors (28286267).

138584605 is an equidigital number, since it uses as much as digits as its factorization.

138584605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94895.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 138584605 is about 11772.1962691759. The cubic root of 138584605 is about 517.4936154860.

The spelling of 138584605 in words is "one hundred thirty-eight million, five hundred eighty-four thousand, six hundred five".