13861398769 has 2 divisors, whose sum is σ = 13861398770. Its totient is φ = 13861398768.

The previous prime is 13861398731. The next prime is 13861398779. The reversal of 13861398769 is 96789316831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10254195169 + 3607203600 = 101263^2 + 60060^2 .

It is an emirp because it is prime and its reverse (96789316831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13861398769 - 2⁷ = 13861398641 is a prime.

It is a super-2 number, since 2×13861398769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13861398709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930699384 + 6930699385.

It is an arithmetic number, because the mean of its divisors is an integer number (6930699385).

Almost surely, 2^13861398769 is an apocalyptic number.

It is an amenable number.

13861398769 is a deficient number, since it is larger than the sum of its proper divisors (1).

13861398769 is an equidigital number, since it uses as much as digits as its factorization.

13861398769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 61.

The spelling of 13861398769 in words is "thirteen billion, eight hundred sixty-one million, three hundred ninety-eight thousand, seven hundred sixty-nine".