861852163 has 4 divisors (see below), whose sum is σ = 872236008. Its totient is φ = 851468320.

The previous prime is 861852149. The next prime is 861852169. The reversal of 861852163 is 361258168.

861852163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 861852163 - 2²¹ = 859755011 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861852169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5191798 + ... + 5191963.

It is an arithmetic number, because the mean of its divisors is an integer number (218059002).

Almost surely, 2^861852163 is an apocalyptic number.

861852163 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

861852163 is a deficient number, since it is larger than the sum of its proper divisors (10383845).

861852163 is a wasteful number, since it uses less digits than its factorization.

861852163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383844.

The product of its digits is 69120, while the sum is 40.

The square root of 861852163 is about 29357.3187297478. The cubic root of 861852163 is about 951.6507451034.

The spelling of 861852163 in words is "eight hundred sixty-one million, eight hundred fifty-two thousand, one hundred sixty-three".