138361589 has 8 divisors (see below), whose sum is σ = 146703960. Its totient is φ = 130041856.

The previous prime is 138361579. The next prime is 138361621. The reversal of 138361589 is 985163831.

It can be written as a sum of positive squares in 4 ways, for example, as 25300900 + 113060689 = 5030^2 + 10633^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138361589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138361519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7877 + ... + 18405.

It is an arithmetic number, because the mean of its divisors is an integer number (18337995).

Almost surely, 2^138361589 is an apocalyptic number.

It is an amenable number.

138361589 is a deficient number, since it is larger than the sum of its proper divisors (8342371).

138361589 is a wasteful number, since it uses less digits than its factorization.

138361589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11319.

The product of its digits is 155520, while the sum is 44.

The square root of 138361589 is about 11762.7203061197. The cubic root of 138361589 is about 517.2158758368.

The spelling of 138361589 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, five hundred eighty-nine".