6812138587 has 8 divisors (see below), whose sum is σ = 6921346320. Its totient is φ = 6703656960.

The previous prime is 6812138569. The next prime is 6812138611. The reversal of 6812138587 is 7858312186.

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 6812138587 - 2²⁷ = 6677920859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6812138587.

It is not an unprimeable number, because it can be changed into a prime (6812138087) 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, 162598 + ... + 200155.

It is an arithmetic number, because the mean of its divisors is an integer number (865168290).

Almost surely, 2^6812138587 is an apocalyptic number.

6812138587 is a deficient number, since it is larger than the sum of its proper divisors (109207733).

6812138587 is a wasteful number, since it uses less digits than its factorization.

6812138587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363053.

The product of its digits is 645120, while the sum is 49.

The square root of 6812138587 is about 82535.6806902324. The cubic root of 6812138587 is about 1895.6631079747.

The spelling of 6812138587 in words is "six billion, eight hundred twelve million, one hundred thirty-eight thousand, five hundred eighty-seven".