138869558 has 8 divisors (see below), whose sum is σ = 208363080. Its totient is φ = 69415200.

The previous prime is 138869551. The next prime is 138869567. The reversal of 138869558 is 855968831.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138869551) 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, 1838 + ... + 16766.

It is an arithmetic number, because the mean of its divisors is an integer number (26045385).

Almost surely, 2^138869558 is an apocalyptic number.

138869558 is a deficient number, since it is larger than the sum of its proper divisors (69493522).

138869558 is a wasteful number, since it uses less digits than its factorization.

138869558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582.

The product of its digits is 2073600, while the sum is 53.

The square root of 138869558 is about 11784.2928510794. The cubic root of 138869558 is about 517.8480569844.

The spelling of 138869558 in words is "one hundred thirty-eight million, eight hundred sixty-nine thousand, five hundred fifty-eight".