13811899369 has 4 divisors (see below), whose sum is σ = 13814494596. Its totient is φ = 13809304144.

The previous prime is 13811899363. The next prime is 13811899393. The reversal of 13811899369 is 96399811831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96399811831 = 463 ⋅208206937.

It can be written as a sum of positive squares in 2 ways, for example, as 12661875625 + 1150023744 = 112525^2 + 33912^2 .

It is a cyclic number.

It is not a de Polignac number, because 13811899369 - 2¹⁷ = 13811768297 is a prime.

It is a super-2 number, since 2×13811899369² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13811899363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1289614 + ... + 1300279.

It is an arithmetic number, because the mean of its divisors is an integer number (3453623649).

Almost surely, 2^13811899369 is an apocalyptic number.

It is an amenable number.

13811899369 is a deficient number, since it is larger than the sum of its proper divisors (2595227).

13811899369 is an equidigital number, since it uses as much as digits as its factorization.

13811899369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595226.

The product of its digits is 2519424, while the sum is 58.

The spelling of 13811899369 in words is "thirteen billion, eight hundred eleven million, eight hundred ninety-nine thousand, three hundred sixty-nine".