316985 has 4 divisors (see below), whose sum is σ = 380388. Its totient is φ = 253584.

The previous prime is 316961. The next prime is 316991. The reversal of 316985 is 589613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589613 = 239 ⋅2467.

It can be written as a sum of positive squares in 2 ways, for example, as 116281 + 200704 = 341^2 + 448^2 .

It is a cyclic number.

It is not a de Polignac number, because 316985 - 2¹⁰ = 315961 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 316985.

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, 31694 + ... + 31703.

It is an arithmetic number, because the mean of its divisors is an integer number (95097).

2³¹⁶⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

316985 is a deficient number, since it is larger than the sum of its proper divisors (63403).

316985 is an equidigital number, since it uses as much as digits as its factorization.

316985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63402.

The product of its digits is 6480, while the sum is 32.

The square root of 316985 is about 563.0142094122. The cubic root of 316985 is about 68.1835439294.

The spelling of 316985 in words is "three hundred sixteen thousand, nine hundred eighty-five".