138313939459 has 2 divisors, whose sum is σ = 138313939460. Its totient is φ = 138313939458.

The previous prime is 138313939447. The next prime is 138313939483. The reversal of 138313939459 is 954939313831.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (954939313831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138313939459 - 2²⁷ = 138179721731 is a prime.

It is not a weakly prime, because it can be changed into another prime (138313939409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69156969729 + 69156969730.

It is an arithmetic number, because the mean of its divisors is an integer number (69156969730).

Almost surely, 2^138313939459 is an apocalyptic number.

138313939459 is a deficient number, since it is larger than the sum of its proper divisors (1).

138313939459 is an equidigital number, since it uses as much as digits as its factorization.

138313939459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 58.

The spelling of 138313939459 in words is "one hundred thirty-eight billion, three hundred thirteen million, nine hundred thirty-nine thousand, four hundred fifty-nine".