317861 has 4 divisors (see below), whose sum is σ = 324672. Its totient is φ = 311052.

The previous prime is 317857. The next prime is 317887. The reversal of 317861 is 168713.

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 317861 - 2² = 317857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 317861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317831) 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, 3335 + ... + 3428.

It is an arithmetic number, because the mean of its divisors is an integer number (81168).

2³¹⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

317861 is a deficient number, since it is larger than the sum of its proper divisors (6811).

317861 is an equidigital number, since it uses as much as digits as its factorization.

317861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810.

The product of its digits is 1008, while the sum is 26.

The square root of 317861 is about 563.7916281748. The cubic root of 317861 is about 68.2462954243.

The spelling of 317861 in words is "three hundred seventeen thousand, eight hundred sixty-one".