8138441687 has 8 divisors (see below), whose sum is σ = 8407847040. Its totient is φ = 7869466080.

The previous prime is 8138441683. The next prime is 8138441737. The reversal of 8138441687 is 7861448318.

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 not a de Polignac number, because 8138441687 - 2² = 8138441683 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 (8138441681) 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 7 ways as a sum of consecutive naturals, for example, 68708 + ... + 144905.

It is an arithmetic number, because the mean of its divisors is an integer number (1050980880).

Almost surely, 2^8138441687 is an apocalyptic number.

8138441687 is a deficient number, since it is larger than the sum of its proper divisors (269405353).

8138441687 is a wasteful number, since it uses less digits than its factorization.

8138441687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214873.

The product of its digits is 1032192, while the sum is 50.

The square root of 8138441687 is about 90213.3121385087. The cubic root of 8138441687 is about 2011.4708908025.

The spelling of 8138441687 in words is "eight billion, one hundred thirty-eight million, four hundred forty-one thousand, six hundred eighty-seven".