316981597 has 2 divisors, whose sum is σ = 316981598. Its totient is φ = 316981596.

The previous prime is 316981589. The next prime is 316981601. The reversal of 316981597 is 795189613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282946041 + 34035556 = 16821^2 + 5834^2 .

It is an emirp because it is prime and its reverse (795189613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316981597 - 2³ = 316981589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 316981597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316981517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158490798 + 158490799.

It is an arithmetic number, because the mean of its divisors is an integer number (158490799).

Almost surely, 2^316981597 is an apocalyptic number.

It is an amenable number.

316981597 is a deficient number, since it is larger than the sum of its proper divisors (1).

316981597 is an equidigital number, since it uses as much as digits as its factorization.

316981597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The square root of 316981597 is about 17803.9769995358. The cubic root of 316981597 is about 681.8329993316.

The spelling of 316981597 in words is "three hundred sixteen million, nine hundred eighty-one thousand, five hundred ninety-seven".