138360517 has 2 divisors, whose sum is σ = 138360518. Its totient is φ = 138360516.

The previous prime is 138360511. The next prime is 138360529. The reversal of 138360517 is 715063831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138274081 + 86436 = 11759^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 138360517 - 2¹¹ = 138358469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138360511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69180258 + 69180259.

It is an arithmetic number, because the mean of its divisors is an integer number (69180259).

Almost surely, 2^138360517 is an apocalyptic number.

It is an amenable number.

138360517 is a deficient number, since it is larger than the sum of its proper divisors (1).

138360517 is an equidigital number, since it uses as much as digits as its factorization.

138360517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 138360517 is about 11762.6747383408. The cubic root of 138360517 is about 517.2145400691.

The spelling of 138360517 in words is "one hundred thirty-eight million, three hundred sixty thousand, five hundred seventeen".