138340231214909 has 2 divisors, whose sum is σ = 138340231214910. Its totient is φ = 138340231214908.

The previous prime is 138340231214881. The next prime is 138340231215007. The reversal of 138340231214909 is 909412132043831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134199018424900 + 4141212790009 = 11584430^2 + 2034997^2 .

It is a cyclic number.

It is not a de Polignac number, because 138340231214909 - 2²⁴ = 138340214437693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138340231274909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69170115607454 + 69170115607455.

It is an arithmetic number, because the mean of its divisors is an integer number (69170115607455).

Almost surely, 2^{138340231214909} is an apocalyptic number.

It is an amenable number.

138340231214909 is a deficient number, since it is larger than the sum of its proper divisors (1).

138340231214909 is an equidigital number, since it uses as much as digits as its factorization.

138340231214909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 138340231214909 in words is "one hundred thirty-eight trillion, three hundred forty billion, two hundred thirty-one million, two hundred fourteen thousand, nine hundred nine".