861974867 has 12 divisors (see below), whose sum is σ = 935078760. Its totient is φ = 794222208.

The previous prime is 861974833. The next prime is 861974909. The reversal of 861974867 is 768479168.

It is not a de Polignac number, because 861974867 - 2⁶ = 861974803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861974567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94859 + ... + 103547.

It is an arithmetic number, because the mean of its divisors is an integer number (77923230).

Almost surely, 2^861974867 is an apocalyptic number.

861974867 is a deficient number, since it is larger than the sum of its proper divisors (73103893).

861974867 is a wasteful number, since it uses less digits than its factorization.

861974867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302 (or 9289 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 861974867 is about 29359.4084919979. The cubic root of 861974867 is about 951.6959059082.

The spelling of 861974867 in words is "eight hundred sixty-one million, nine hundred seventy-four thousand, eight hundred sixty-seven".