13861782917 has 2 divisors, whose sum is σ = 13861782918. Its totient is φ = 13861782916.

The previous prime is 13861782871. The next prime is 13861782929. The reversal of 13861782917 is 71928716831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11956547716 + 1905235201 = 109346^2 + 43649^2 .

It is a cyclic number.

It is not a de Polignac number, because 13861782917 - 2²⁴ = 13845005701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13861782997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930891458 + 6930891459.

It is an arithmetic number, because the mean of its divisors is an integer number (6930891459).

Almost surely, 2^13861782917 is an apocalyptic number.

It is an amenable number.

13861782917 is a deficient number, since it is larger than the sum of its proper divisors (1).

13861782917 is an equidigital number, since it uses as much as digits as its factorization.

13861782917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 53.

The spelling of 13861782917 in words is "thirteen billion, eight hundred sixty-one million, seven hundred eighty-two thousand, nine hundred seventeen".