812317 has 4 divisors (see below), whose sum is σ = 886176. Its totient is φ = 738460.

The previous prime is 812309. The next prime is 812341. The reversal of 812317 is 713218.

812317 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, 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 812317 - 2³ = 812309 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812347) 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, 36913 + ... + 36934.

It is an arithmetic number, because the mean of its divisors is an integer number (221544).

2⁸¹²³¹⁷ is an apocalyptic number.

It is an amenable number.

812317 is a deficient number, since it is larger than the sum of its proper divisors (73859).

812317 is a wasteful number, since it uses less digits than its factorization.

812317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73858.

The product of its digits is 336, while the sum is 22.

The square root of 812317 is about 901.2863030136. The cubic root of 812317 is about 93.3057727581.

Subtracting from 812317 its reverse (713218), we obtain a palindrome (99099).

The spelling of 812317 in words is "eight hundred twelve thousand, three hundred seventeen".