805847 has 16 divisors (see below), whose sum is σ = 994560. Its totient is φ = 637632.

The previous prime is 805843. The next prime is 805853. The reversal of 805847 is 748508.

It is a cyclic number.

It is not a de Polignac number, because 805847 - 2² = 805843 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805847.

It is not an unprimeable number, because it can be changed into a prime (805843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9668 + ... + 9750.

It is an arithmetic number, because the mean of its divisors is an integer number (62160).

2⁸⁰⁵⁸⁴⁷ is an apocalyptic number.

805847 is a deficient number, since it is larger than the sum of its proper divisors (188713).

805847 is a wasteful number, since it uses less digits than its factorization.

805847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 805847 is about 897.6898127973. The cubic root of 805847 is about 93.0573893288.

Subtracting from 805847 its sum of digits (32), we obtain a triangular number (805815 = T₁₂₆₉).

The spelling of 805847 in words is "eight hundred five thousand, eight hundred forty-seven".