138053185709 has 2 divisors, whose sum is σ = 138053185710. Its totient is φ = 138053185708.

The previous prime is 138053185667. The next prime is 138053185769. The reversal of 138053185709 is 907581350831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129022484809 + 9030700900 = 359197^2 + 95030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138053185709 is a prime.

It is a super-3 number, since 3×138053185709³ (a number of 34 digits) contains 333 as substring.

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 (138053185769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69026592854 + 69026592855.

It is an arithmetic number, because the mean of its divisors is an integer number (69026592855).

Almost surely, 2^138053185709 is an apocalyptic number.

It is an amenable number.

138053185709 is a deficient number, since it is larger than the sum of its proper divisors (1).

138053185709 is an equidigital number, since it uses as much as digits as its factorization.

138053185709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 50.

The spelling of 138053185709 in words is "one hundred thirty-eight billion, fifty-three million, one hundred eighty-five thousand, seven hundred nine".