138873094813 has 2 divisors, whose sum is σ = 138873094814. Its totient is φ = 138873094812.

The previous prime is 138873094793. The next prime is 138873094847. The reversal of 138873094813 is 318490378831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122967344889 + 15905749924 = 350667^2 + 126118^2 .

It is an emirp because it is prime and its reverse (318490378831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138873094813 - 2¹⁷ = 138872963741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138873094013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69436547406 + 69436547407.

It is an arithmetic number, because the mean of its divisors is an integer number (69436547407).

Almost surely, 2^138873094813 is an apocalyptic number.

It is an amenable number.

138873094813 is a deficient number, since it is larger than the sum of its proper divisors (1).

138873094813 is an equidigital number, since it uses as much as digits as its factorization.

138873094813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 138873094813 in words is "one hundred thirty-eight billion, eight hundred seventy-three million, ninety-four thousand, eight hundred thirteen".