138318235589 has 2 divisors, whose sum is σ = 138318235590. Its totient is φ = 138318235588.

The previous prime is 138318235571. The next prime is 138318235591. The reversal of 138318235589 is 985532813831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100843083364 + 37475152225 = 317558^2 + 193585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138318235589 is a prime.

Together with 138318235591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138318235189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69159117794 + 69159117795.

It is an arithmetic number, because the mean of its divisors is an integer number (69159117795).

Almost surely, 2^138318235589 is an apocalyptic number.

It is an amenable number.

138318235589 is a deficient number, since it is larger than the sum of its proper divisors (1).

138318235589 is an equidigital number, since it uses as much as digits as its factorization.

138318235589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 56.

The spelling of 138318235589 in words is "one hundred thirty-eight billion, three hundred eighteen million, two hundred thirty-five thousand, five hundred eighty-nine".