13889104787 has 4 divisors (see below), whose sum is σ = 14064916320. Its totient is φ = 13713293256.

The previous prime is 13889104769. The next prime is 13889104819. The reversal of 13889104787 is 78740198831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78740198831 = 7 ⋅11248599833.

It is a cyclic number.

It is not a de Polignac number, because 13889104787 - 2¹⁶ = 13889039251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13889104387) 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, 87905648 + ... + 87905805.

It is an arithmetic number, because the mean of its divisors is an integer number (3516229080).

Almost surely, 2^13889104787 is an apocalyptic number.

13889104787 is a deficient number, since it is larger than the sum of its proper divisors (175811533).

13889104787 is an equidigital number, since it uses as much as digits as its factorization.

13889104787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175811532.

The product of its (nonzero) digits is 2709504, while the sum is 56.

The spelling of 13889104787 in words is "thirteen billion, eight hundred eighty-nine million, one hundred four thousand, seven hundred eighty-seven".