13974817987 has 4 divisors (see below), whose sum is σ = 15049804000. Its totient is φ = 12899831976.

The previous prime is 13974817943. The next prime is 13974818017. The reversal of 13974817987 is 78971847931.

It is a happy number.

13974817987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78971847931 = 19 ⋅4156413049.

It is a cyclic number.

It is not a de Polignac number, because 13974817987 - 2¹⁵ = 13974785219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13974817937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537492987 + ... + 537493012.

It is an arithmetic number, because the mean of its divisors is an integer number (3762451000).

Almost surely, 2^13974817987 is an apocalyptic number.

13974817987 is a deficient number, since it is larger than the sum of its proper divisors (1074986013).

13974817987 is a wasteful number, since it uses less digits than its factorization.

13974817987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074986012.

The product of its digits is 21337344, while the sum is 64.

The spelling of 13974817987 in words is "thirteen billion, nine hundred seventy-four million, eight hundred seventeen thousand, nine hundred eighty-seven".