13876621987 has 16 divisors (see below), whose sum is σ = 14159388672. Its totient is φ = 13596327360.

The previous prime is 13876621981. The next prime is 13876621999. The reversal of 13876621987 is 78912667831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13876621987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13876621981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16191663 + ... + 16192519.

It is an arithmetic number, because the mean of its divisors is an integer number (884961792).

Almost surely, 2^13876621987 is an apocalyptic number.

13876621987 is a deficient number, since it is larger than the sum of its proper divisors (282766685).

13876621987 is an equidigital number, since it uses as much as digits as its factorization.

13876621987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938.

The product of its digits is 6096384, while the sum is 58.

The spelling of 13876621987 in words is "thirteen billion, eight hundred seventy-six million, six hundred twenty-one thousand, nine hundred eighty-seven".