805853 has 2 divisors, whose sum is σ = 805854. Its totient is φ = 805852.

The previous prime is 805843. The next prime is 805859. The reversal of 805853 is 358508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770884 + 34969 = 878^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 805853 - 2⁶ = 805789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₆₄₃₈₈ and since 805853 and 64388 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402926 + 402927.

It is an arithmetic number, because the mean of its divisors is an integer number (402927).

2⁸⁰⁵⁸⁵³ is an apocalyptic number.

It is an amenable number.

805853 is a deficient number, since it is larger than the sum of its proper divisors (1).

805853 is an equidigital number, since it uses as much as digits as its factorization.

805853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 805853 is about 897.6931547027. The cubic root of 805853 is about 93.0576202837.

The spelling of 805853 in words is "eight hundred five thousand, eight hundred fifty-three".