138847284539 has 2 divisors, whose sum is σ = 138847284540. Its totient is φ = 138847284538.

The previous prime is 138847284533. The next prime is 138847284601. The reversal of 138847284539 is 935482748831.

It is an a-pointer prime, because the next prime (138847284601) can be obtained adding 138847284539 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138847284539 - 2²⁸ = 138578849083 is a prime.

It is not a weakly prime, because it can be changed into another prime (138847284533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69423642269 + 69423642270.

It is an arithmetic number, because the mean of its divisors is an integer number (69423642270).

Almost surely, 2^138847284539 is an apocalyptic number.

138847284539 is a deficient number, since it is larger than the sum of its proper divisors (1).

138847284539 is an equidigital number, since it uses as much as digits as its factorization.

138847284539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46448640, while the sum is 62.

The spelling of 138847284539 in words is "one hundred thirty-eight billion, eight hundred forty-seven million, two hundred eighty-four thousand, five hundred thirty-nine".