138731359 has 8 divisors (see below), whose sum is σ = 149697072. Its totient is φ = 127807680.

The previous prime is 138731353. The next prime is 138731387. The reversal of 138731359 is 953137831.

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

It is not a de Polignac number, because 138731359 - 2¹⁵ = 138698591 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 (138731353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3469 + ... + 17014.

It is an arithmetic number, because the mean of its divisors is an integer number (18712134).

Almost surely, 2^138731359 is an apocalyptic number.

138731359 is a deficient number, since it is larger than the sum of its proper divisors (10965713).

138731359 is a wasteful number, since it uses less digits than its factorization.

138731359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21017.

The product of its digits is 68040, while the sum is 40.

The square root of 138731359 is about 11778.4276964288. The cubic root of 138731359 is about 517.6762174587.

The spelling of 138731359 in words is "one hundred thirty-eight million, seven hundred thirty-one thousand, three hundred fifty-nine".