13888888889 has 4 divisors (see below), whose sum is σ = 13897222224. Its totient is φ = 13880555556.

The previous prime is 13888888847. The next prime is 13888888901. The reversal of 13888888889 is 98888888831.

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.

It is a de Polignac number, because none of the positive numbers 2^k-13888888889 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13888888289) 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, 4164167 + ... + 4167500.

It is an arithmetic number, because the mean of its divisors is an integer number (3474305556).

Almost surely, 2^13888888889 is an apocalyptic number.

It is an amenable number.

13888888889 is a deficient number, since it is larger than the sum of its proper divisors (8333335).

13888888889 is an equidigital number, since it uses as much as digits as its factorization.

13888888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333334.

The product of its digits is 452984832, while the sum is 77.

The spelling of 13888888889 in words is "thirteen billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".