847859 has 4 divisors (see below), whose sum is σ = 853104. Its totient is φ = 842616.

The previous prime is 847853. The next prime is 847871. The reversal of 847859 is 958748.

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 847859 - 2¹² = 843763 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847859.

It is not an unprimeable number, because it can be changed into a prime (847853) 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, 2372 + ... + 2705.

It is an arithmetic number, because the mean of its divisors is an integer number (213276).

2⁸⁴⁷⁸⁵⁹ is an apocalyptic number.

847859 is a deficient number, since it is larger than the sum of its proper divisors (5245).

847859 is a wasteful number, since it uses less digits than its factorization.

847859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244.

The product of its digits is 80640, while the sum is 41.

The square root of 847859 is about 920.7925933673. The cubic root of 847859 is about 94.6472234640.

Subtracting 847859 from its reverse (958748), we obtain a square (110889 = 333²).

The spelling of 847859 in words is "eight hundred forty-seven thousand, eight hundred fifty-nine".