317662981 has 2 divisors, whose sum is σ = 317662982. Its totient is φ = 317662980.

The previous prime is 317662927. The next prime is 317662993. The reversal of 317662981 is 189266713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274432356 + 43230625 = 16566^2 + 6575^2 .

It is a cyclic number.

It is not a de Polignac number, because 317662981 - 2⁷ = 317662853 is a prime.

It is a super-2 number, since 2×317662981² = 201819538995612722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (317642981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158831490 + 158831491.

It is an arithmetic number, because the mean of its divisors is an integer number (158831491).

Almost surely, 2^317662981 is an apocalyptic number.

It is an amenable number.

317662981 is a deficient number, since it is larger than the sum of its proper divisors (1).

317662981 is an equidigital number, since it uses as much as digits as its factorization.

317662981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 317662981 is about 17823.1024515935. The cubic root of 317662981 is about 682.3212060112.

The spelling of 317662981 in words is "three hundred seventeen million, six hundred sixty-two thousand, nine hundred eighty-one".