13913519869 has 2 divisors, whose sum is σ = 13913519870. Its totient is φ = 13913519868.

The previous prime is 13913519821. The next prime is 13913519891. The reversal of 13913519869 is 96891531931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10993522500 + 2919997369 = 104850^2 + 54037^2 .

It is an emirp because it is prime and its reverse (96891531931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13913519869 - 2¹⁵ = 13913487101 is a prime.

It is a super-2 number, since 2×13913519869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13913519069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6956759934 + 6956759935.

It is an arithmetic number, because the mean of its divisors is an integer number (6956759935).

Almost surely, 2^13913519869 is an apocalyptic number.

It is an amenable number.

13913519869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13913519869 is an equidigital number, since it uses as much as digits as its factorization.

13913519869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 55.

The spelling of 13913519869 in words is "thirteen billion, nine hundred thirteen million, five hundred nineteen thousand, eight hundred sixty-nine".