13115887069 has 4 divisors (see below), whose sum is σ = 13394948544. Its totient is φ = 12836825596.

The previous prime is 13115887033. The next prime is 13115887097. The reversal of 13115887069 is 96078851131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96078851131 = 79 ⋅1216187989.

It is a cyclic number.

It is not a de Polignac number, because 13115887069 - 2⁹ = 13115886557 is a prime.

It is a super-2 number, since 2×13115887069² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13115887009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139530667 + ... + 139530760.

It is an arithmetic number, because the mean of its divisors is an integer number (3348737136).

Almost surely, 2^13115887069 is an apocalyptic number.

It is an amenable number.

13115887069 is a deficient number, since it is larger than the sum of its proper divisors (279061475).

13115887069 is an equidigital number, since it uses as much as digits as its factorization.

13115887069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279061474.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 13115887069 in words is "thirteen billion, one hundred fifteen million, eight hundred eighty-seven thousand, sixty-nine".