138589909097 has 2 divisors, whose sum is σ = 138589909098. Its totient is φ = 138589909096.

The previous prime is 138589909093. The next prime is 138589909123. The reversal of 138589909097 is 790909985831.

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., 88175739136 + 50414169961 = 296944^2 + 224531^2 .

It is a cyclic number.

It is not a de Polignac number, because 138589909097 - 2² = 138589909093 is a prime.

It is not a weakly prime, because it can be changed into another prime (138589909093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69294954548 + 69294954549.

It is an arithmetic number, because the mean of its divisors is an integer number (69294954549).

Almost surely, 2^138589909097 is an apocalyptic number.

It is an amenable number.

138589909097 is a deficient number, since it is larger than the sum of its proper divisors (1).

138589909097 is an equidigital number, since it uses as much as digits as its factorization.

138589909097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44089920, while the sum is 68.

The spelling of 138589909097 in words is "one hundred thirty-eight billion, five hundred eighty-nine million, nine hundred nine thousand, ninety-seven".