861103687 has 2 divisors, whose sum is σ = 861103688. Its totient is φ = 861103686.

The previous prime is 861103673. The next prime is 861103723. The reversal of 861103687 is 786301168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861103687 - 2⁷ = 861103559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861103657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430551843 + 430551844.

It is an arithmetic number, because the mean of its divisors is an integer number (430551844).

Almost surely, 2^861103687 is an apocalyptic number.

861103687 is a deficient number, since it is larger than the sum of its proper divisors (1).

861103687 is an equidigital number, since it uses as much as digits as its factorization.

861103687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 861103687 is about 29344.5682708061. The cubic root of 861103687 is about 951.3751781061.

The spelling of 861103687 in words is "eight hundred sixty-one million, one hundred three thousand, six hundred eighty-seven".