138986000009 has 2 divisors, whose sum is σ = 138986000010. Its totient is φ = 138986000008.

The previous prime is 138985999991. The next prime is 138986000077. The reversal of 138986000009 is 900000689831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81711937609 + 57274062400 = 285853^2 + 239320^2 .

It is an emirp because it is prime and its reverse (900000689831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138986000009 is a prime.

It is not a weakly prime, because it can be changed into another prime (138986060009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69493000004 + 69493000005.

It is an arithmetic number, because the mean of its divisors is an integer number (69493000005).

Almost surely, 2^138986000009 is an apocalyptic number.

It is an amenable number.

138986000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

138986000009 is an equidigital number, since it uses as much as digits as its factorization.

138986000009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 138986000009 in words is "one hundred thirty-eight billion, nine hundred eighty-six million, nine", and thus it is an aban number.