13687035787 has 4 divisors (see below), whose sum is σ = 13687468416. Its totient is φ = 13686603160.

The previous prime is 13687035727. The next prime is 13687035797. The reversal of 13687035787 is 78753078631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13687035787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13687035727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164764 + ... + 233497.

It is an arithmetic number, because the mean of its divisors is an integer number (3421867104).

Almost surely, 2^13687035787 is an apocalyptic number.

13687035787 is a deficient number, since it is larger than the sum of its proper divisors (432629).

13687035787 is an equidigital number, since it uses as much as digits as its factorization.

13687035787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432628.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 13687035787 in words is "thirteen billion, six hundred eighty-seven million, thirty-five thousand, seven hundred eighty-seven".