316681 has 2 divisors, whose sum is σ = 316682. Its totient is φ = 316680.

The previous prime is 316663. The next prime is 316691. The reversal of 316681 is 186613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259081 + 57600 = 509^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 316681 - 2⁵ = 316649 is a prime.

It is a super-2 number, since 2×316681² = 200573711522, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (316621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158340 + 158341.

It is an arithmetic number, because the mean of its divisors is an integer number (158341).

2³¹⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

316681 is a deficient number, since it is larger than the sum of its proper divisors (1).

316681 is an equidigital number, since it uses as much as digits as its factorization.

316681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 316681 is about 562.7441692279. The cubic root of 316681 is about 68.1617401352.

The spelling of 316681 in words is "three hundred sixteen thousand, six hundred eighty-one".