13599685987 has 4 divisors (see below), whose sum is σ = 13889041056. Its totient is φ = 13310330920.

The previous prime is 13599685973. The next prime is 13599686003. The reversal of 13599685987 is 78958699531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78958699531 = 79601 ⋅991931.

It is a cyclic number.

It is not a de Polignac number, because 13599685987 - 2¹⁹ = 13599161699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13599685927) 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, 144677464 + ... + 144677557.

It is an arithmetic number, because the mean of its divisors is an integer number (3472260264).

Almost surely, 2^13599685987 is an apocalyptic number.

13599685987 is a deficient number, since it is larger than the sum of its proper divisors (289355069).

13599685987 is an equidigital number, since it uses as much as digits as its factorization.

13599685987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289355068.

The product of its digits is 146966400, while the sum is 70.

The spelling of 13599685987 in words is "thirteen billion, five hundred ninety-nine million, six hundred eighty-five thousand, nine hundred eighty-seven".