317386217 has 4 divisors (see below), whose sum is σ = 317508240. Its totient is φ = 317264196.

The previous prime is 317386163. The next prime is 317386219. The reversal of 317386217 is 712683713.

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 317386217 - 2²² = 313191913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (317386219) 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, 57023 + ... + 62340.

It is an arithmetic number, because the mean of its divisors is an integer number (79377060).

Almost surely, 2^317386217 is an apocalyptic number.

It is an amenable number.

317386217 is a deficient number, since it is larger than the sum of its proper divisors (122023).

317386217 is a wasteful number, since it uses less digits than its factorization.

317386217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122022.

The product of its digits is 42336, while the sum is 38.

The square root of 317386217 is about 17815.3365671267. The cubic root of 317386217 is about 682.1229908933.

The spelling of 317386217 in words is "three hundred seventeen million, three hundred eighty-six thousand, two hundred seventeen".