805317 has 4 divisors (see below), whose sum is σ = 1073760. Its totient is φ = 536876.

The previous prime is 805313. The next prime is 805327. The reversal of 805317 is 713508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 805317 - 2² = 805313 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805313) 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, 134217 + ... + 134222.

It is an arithmetic number, because the mean of its divisors is an integer number (268440).

2⁸⁰⁵³¹⁷ is an apocalyptic number.

It is an amenable number.

805317 is a deficient number, since it is larger than the sum of its proper divisors (268443).

805317 is a wasteful number, since it uses less digits than its factorization.

805317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268442.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 805317 is about 897.3945620517. The cubic root of 805317 is about 93.0369837875.

Subtracting from 805317 its reverse (713508), we obtain a square (91809 = 303²).

The spelling of 805317 in words is "eight hundred five thousand, three hundred seventeen".