13987988609 has 16 divisors (see below), whose sum is σ = 16627961856. Its totient is φ = 11514344400.

The previous prime is 13987988593. The next prime is 13987988617. The reversal of 13987988609 is 90688978931.

It is a cyclic number.

It is not a de Polignac number, because 13987988609 - 2⁴ = 13987988593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13987988669) 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, 217607 + ... + 274460.

It is an arithmetic number, because the mean of its divisors is an integer number (1039247616).

Almost surely, 2^13987988609 is an apocalyptic number.

It is an amenable number.

13987988609 is a deficient number, since it is larger than the sum of its proper divisors (2639973247).

13987988609 is a wasteful number, since it uses less digits than its factorization.

13987988609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492236.

The product of its (nonzero) digits is 47029248, while the sum is 68.

The spelling of 13987988609 in words is "thirteen billion, nine hundred eighty-seven million, nine hundred eighty-eight thousand, six hundred nine".