138557583 has 6 divisors (see below), whose sum is σ = 200138744. Its totient is φ = 92371716.

The previous prime is 138557539. The next prime is 138557591. The reversal of 138557583 is 385755831.

138557583 is a `hidden beast` number, since 13 + 8 + 5 + 57 + 583 = 666.

It is not a de Polignac number, because 138557583 - 2⁹ = 138557071 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 (138557483) 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 5 ways as a sum of consecutive naturals, for example, 7697635 + ... + 7697652.

Almost surely, 2^138557583 is an apocalyptic number.

138557583 is a deficient number, since it is larger than the sum of its proper divisors (61581161).

138557583 is a wasteful number, since it uses less digits than its factorization.

138557583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15395293 (or 15395290 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 138557583 is about 11771.0485089477. The cubic root of 138557583 is about 517.4599787015.

The spelling of 138557583 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, five hundred eighty-three".