138737757989 has 2 divisors, whose sum is σ = 138737757990. Its totient is φ = 138737757988.

The previous prime is 138737757967. The next prime is 138737758007. The reversal of 138737757989 is 989757737831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137764941889 + 972816100 = 371167^2 + 31190^2 .

It is a cyclic number.

It is not a de Polignac number, because 138737757989 - 2⁸ = 138737757733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138737757589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69368878994 + 69368878995.

It is an arithmetic number, because the mean of its divisors is an integer number (69368878995).

Almost surely, 2^138737757989 is an apocalyptic number.

It is an amenable number.

138737757989 is a deficient number, since it is larger than the sum of its proper divisors (1).

138737757989 is an equidigital number, since it uses as much as digits as its factorization.

138737757989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560105280, while the sum is 74.

The spelling of 138737757989 in words is "one hundred thirty-eight billion, seven hundred thirty-seven million, seven hundred fifty-seven thousand, nine hundred eighty-nine".