138048565 has 4 divisors (see below), whose sum is σ = 165658284. Its totient is φ = 110438848.

The previous prime is 138048529. The next prime is 138048577. The reversal of 138048565 is 565840831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 98585041 + 39463524 = 9929^2 + 6282^2 .

It is a cyclic number.

It is not a de Polignac number, because 138048565 - 2¹⁵ = 138015797 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13804852 + ... + 13804861.

It is an arithmetic number, because the mean of its divisors is an integer number (41414571).

Almost surely, 2^138048565 is an apocalyptic number.

It is an amenable number.

138048565 is a deficient number, since it is larger than the sum of its proper divisors (27609719).

138048565 is an equidigital number, since it uses as much as digits as its factorization.

138048565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27609718.

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

The square root of 138048565 is about 11749.4070063131. The cubic root of 138048565 is about 516.8255381474.

The spelling of 138048565 in words is "one hundred thirty-eight million, forty-eight thousand, five hundred sixty-five".