861382687 has 8 divisors (see below), whose sum is σ = 944612352. Its totient is φ = 778973400.

The previous prime is 861382667. The next prime is 861382723. The reversal of 861382687 is 786283168.

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-861382687 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 861382687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861382657) 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, 202893 + ... + 207094.

It is an arithmetic number, because the mean of its divisors is an integer number (118076544).

Almost surely, 2^861382687 is an apocalyptic number.

861382687 is a deficient number, since it is larger than the sum of its proper divisors (83229665).

861382687 is a wasteful number, since it uses less digits than its factorization.

861382687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410189.

The product of its digits is 774144, while the sum is 49.

The square root of 861382687 is about 29349.3217468479. The cubic root of 861382687 is about 951.4779164161.

The spelling of 861382687 in words is "eight hundred sixty-one million, three hundred eighty-two thousand, six hundred eighty-seven".