2005103687 has 8 divisors (see below), whose sum is σ = 2140364160. Its totient is φ = 1872816120.

The previous prime is 2005103663. The next prime is 2005103689. The reversal of 2005103687 is 7863015002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2005103687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005103689) 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 7 ways as a sum of consecutive naturals, for example, 741833 + ... + 744530.

It is an arithmetic number, because the mean of its divisors is an integer number (267545520).

Almost surely, 2^2005103687 is an apocalyptic number.

2005103687 is a deficient number, since it is larger than the sum of its proper divisors (135260473).

2005103687 is a wasteful number, since it uses less digits than its factorization.

2005103687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486453.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2005103687 is about 44778.3841490512. The cubic root of 2005103687 is about 1260.9918466893.

Adding to 2005103687 its reverse (7863015002), we get a palindrome (9868118689).

The spelling of 2005103687 in words is "two billion, five million, one hundred three thousand, six hundred eighty-seven".