138559739 has 8 divisors (see below), whose sum is σ = 144639360. Its totient is φ = 132580800.

The previous prime is 138559727. The next prime is 138559769. The reversal of 138559739 is 937955831.

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

It is not a de Polignac number, because 138559739 - 2⁸ = 138559483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138559769) 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 7 ways as a sum of consecutive naturals, for example, 22352 + ... + 27869.

It is an arithmetic number, because the mean of its divisors is an integer number (18079920).

Almost surely, 2^138559739 is an apocalyptic number.

138559739 is a deficient number, since it is larger than the sum of its proper divisors (6079621).

138559739 is an equidigital number, since it uses as much as digits as its factorization.

138559739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50341.

The product of its digits is 1020600, while the sum is 50.

The square root of 138559739 is about 11771.1400892182. The cubic root of 138559739 is about 517.4626626348.

The spelling of 138559739 in words is "one hundred thirty-eight million, five hundred fifty-nine thousand, seven hundred thirty-nine".