13988685787 has 4 divisors (see below), whose sum is σ = 14003365320. Its totient is φ = 13974006256.

The previous prime is 13988685757. The next prime is 13988685797. The reversal of 13988685787 is 78758688931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13988685787 - 2¹¹ = 13988683739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13988685757) 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, 7338337 + ... + 7340242.

It is an arithmetic number, because the mean of its divisors is an integer number (3500841330).

Almost surely, 2^13988685787 is an apocalyptic number.

13988685787 is a deficient number, since it is larger than the sum of its proper divisors (14679533).

13988685787 is an equidigital number, since it uses as much as digits as its factorization.

13988685787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14679532.

The product of its digits is 162570240, while the sum is 70.

The spelling of 13988685787 in words is "thirteen billion, nine hundred eighty-eight million, six hundred eighty-five thousand, seven hundred eighty-seven".