861805223 has 8 divisors (see below), whose sum is σ = 882100128. Its totient is φ = 841739904.

The previous prime is 861805201. The next prime is 861805279. The reversal of 861805223 is 322508168.

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 861805223 - 2⁸ = 861804967 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 (861801223) 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, 49790 + ... + 64827.

It is an arithmetic number, because the mean of its divisors is an integer number (110262516).

Almost surely, 2^861805223 is an apocalyptic number.

861805223 is a deficient number, since it is larger than the sum of its proper divisors (20294905).

861805223 is a wasteful number, since it uses less digits than its factorization.

861805223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114793.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 861805223 is about 29356.5192589312. The cubic root of 861805223 is about 951.6334678568.

The spelling of 861805223 in words is "eight hundred sixty-one million, eight hundred five thousand, two hundred twenty-three".