386728427966917 has 2 divisors, whose sum is σ = 386728427966918. Its totient is φ = 386728427966916.

The previous prime is 386728427966911. The next prime is 386728427966981. The reversal of 386728427966917 is 719669724827683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198747711079681 + 187980716887236 = 14097791^2 + 13710606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-386728427966917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (386728427966911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193364213983458 + 193364213983459.

It is an arithmetic number, because the mean of its divisors is an integer number (193364213983459).

Almost surely, 2^{386728427966917} is an apocalyptic number.

It is an amenable number.

386728427966917 is a deficient number, since it is larger than the sum of its proper divisors (1).

386728427966917 is an equidigital number, since it uses as much as digits as its factorization.

386728427966917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18435465216, while the sum is 85.

The spelling of 386728427966917 in words is "three hundred eighty-six trillion, seven hundred twenty-eight billion, four hundred twenty-seven million, nine hundred sixty-six thousand, nine hundred seventeen".