861674787 has 16 divisors (see below), whose sum is σ = 1277062560. Its totient is φ = 574221600.

The previous prime is 861674753. The next prime is 861674831. The reversal of 861674787 is 787476168.

861674787 is a `hidden beast` number, since 8 + 6 + 167 + 478 + 7 = 666.

861674787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 861674787 - 2⁷ = 861674659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861674747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88837 + ... + 98057.

It is an arithmetic number, because the mean of its divisors is an integer number (79816410).

Almost surely, 2^861674787 is an apocalyptic number.

861674787 is a deficient number, since it is larger than the sum of its proper divisors (415387773).

861674787 is a wasteful number, since it uses less digits than its factorization.

861674787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12691 (or 12685 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 861674787 is about 29354.2975899612. The cubic root of 861674787 is about 951.5854548710.

The spelling of 861674787 in words is "eight hundred sixty-one million, six hundred seventy-four thousand, seven hundred eighty-seven".