317945 has 4 divisors (see below), whose sum is σ = 381540. Its totient is φ = 254352.

The previous prime is 317923. The next prime is 317957. The reversal of 317945 is 549713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 99856 = 467^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 317945 - 2¹² = 313849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31790 + ... + 31799.

It is an arithmetic number, because the mean of its divisors is an integer number (95385).

2³¹⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

317945 is a deficient number, since it is larger than the sum of its proper divisors (63595).

317945 is an equidigital number, since it uses as much as digits as its factorization.

317945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63594.

The product of its digits is 3780, while the sum is 29.

The square root of 317945 is about 563.8661188616. The cubic root of 317945 is about 68.2523066304.

It can be divided in two parts, 3 and 17945, that multiplied together give a palindrome (53835).

The spelling of 317945 in words is "three hundred seventeen thousand, nine hundred forty-five".