861112917 has 48 divisors (see below), whose sum is σ = 1571339520. Its totient is φ = 463107456.

The previous prime is 861112909. The next prime is 861112933. The reversal of 861112917 is 719211168.

861112917 is a `hidden beast` number, since 8 + 611 + 1 + 29 + 17 = 666.

861112917 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 861112917 - 2³ = 861112909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861112907) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3348 + ... + 41634.

It is an arithmetic number, because the mean of its divisors is an integer number (32736240).

Almost surely, 2^861112917 is an apocalyptic number.

It is an amenable number.

861112917 is a deficient number, since it is larger than the sum of its proper divisors (710226603).

861112917 is a wasteful number, since it uses less digits than its factorization.

861112917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38327 (or 38314 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 861112917 is about 29344.7255396945. The cubic root of 861112917 is about 951.3785772947.

It can be divided in two parts, 8611 and 12917, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 861112917 in words is "eight hundred sixty-one million, one hundred twelve thousand, nine hundred seventeen".