861700847 has 8 divisors (see below), whose sum is σ = 986101152. Its totient is φ = 737625600.

The previous prime is 861700837. The next prime is 861700849. The reversal of 861700847 is 748007168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861700847 - 2⁸ = 861700591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861700849) 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, 75554 + ... + 86207.

It is an arithmetic number, because the mean of its divisors is an integer number (123262644).

Almost surely, 2^861700847 is an apocalyptic number.

861700847 is a deficient number, since it is larger than the sum of its proper divisors (124400305).

861700847 is a wasteful number, since it uses less digits than its factorization.

861700847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162529.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 861700847 is about 29354.7414739084. The cubic root of 861700847 is about 951.5950478433.

The spelling of 861700847 in words is "eight hundred sixty-one million, seven hundred thousand, eight hundred forty-seven".