845317 has 4 divisors (see below), whose sum is σ = 922176. Its totient is φ = 768460.

The previous prime is 845309. The next prime is 845333. The reversal of 845317 is 713548.

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 not a de Polignac number, because 845317 - 2³ = 845309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845347) 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, 38413 + ... + 38434.

It is an arithmetic number, because the mean of its divisors is an integer number (230544).

2⁸⁴⁵³¹⁷ is an apocalyptic number.

It is an amenable number.

845317 is a deficient number, since it is larger than the sum of its proper divisors (76859).

845317 is a wasteful number, since it uses less digits than its factorization.

845317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76858.

The product of its digits is 3360, while the sum is 28.

The square root of 845317 is about 919.4112246432. The cubic root of 845317 is about 94.5525402335.

Subtracting from 845317 its reverse (713548), we obtain a square (131769 = 363²).

The spelling of 845317 in words is "eight hundred forty-five thousand, three hundred seventeen".