316981 has 6 divisors (see below), whose sum is σ = 368790. Its totient is φ = 271656.

The previous prime is 316961. The next prime is 316991. The reversal of 316981 is 189613.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 194481 + 122500 = 441^2 + 350^2 .

It is not a de Polignac number, because 316981 - 2⁷ = 316853 is a prime.

It is a super-2 number, since 2×316981² = 200953908722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3186 + ... + 3283.

It is an arithmetic number, because the mean of its divisors is an integer number (61465).

2³¹⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

316981 is a deficient number, since it is larger than the sum of its proper divisors (51809).

316981 is an equidigital number, since it uses as much as digits as its factorization.

316981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483 (or 6476 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 316981 is about 563.0106570927. The cubic root of 316981 is about 68.1832571279.

The spelling of 316981 in words is "three hundred sixteen thousand, nine hundred eighty-one".