138558853 has 4 divisors (see below), whose sum is σ = 139134028. Its totient is φ = 137983680.

The previous prime is 138558851. The next prime is 138558863. The reversal of 138558853 is 358855831.

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 93373569 + 45185284 = 9663^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 138558853 - 2¹ = 138558851 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 (138558851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287226 + ... + 287707.

It is an arithmetic number, because the mean of its divisors is an integer number (34783507).

Almost surely, 2^138558853 is an apocalyptic number.

It is an amenable number.

138558853 is a deficient number, since it is larger than the sum of its proper divisors (575175).

138558853 is an equidigital number, since it uses as much as digits as its factorization.

138558853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575174.

The product of its digits is 576000, while the sum is 46.

The square root of 138558853 is about 11771.1024547406. The cubic root of 138558853 is about 517.4615596860.

The spelling of 138558853 in words is "one hundred thirty-eight million, five hundred fifty-eight thousand, eight hundred fifty-three".