315998017 has 2 divisors, whose sum is σ = 315998018. Its totient is φ = 315998016.

The previous prime is 315997951. The next prime is 315998021. The reversal of 315998017 is 710899513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294431281 + 21566736 = 17159^2 + 4644^2 .

It is an emirp because it is prime and its reverse (710899513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315998017 - 2¹¹ = 315995969 is a prime.

It is not a weakly prime, because it can be changed into another prime (315998027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157999008 + 157999009.

It is an arithmetic number, because the mean of its divisors is an integer number (157999009).

Almost surely, 2^315998017 is an apocalyptic number.

It is an amenable number.

315998017 is a deficient number, since it is larger than the sum of its proper divisors (1).

315998017 is an equidigital number, since it uses as much as digits as its factorization.

315998017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 315998017 is about 17776.3330583110. Note that the first 3 decimals coincide. The cubic root of 315998017 is about 681.1270360004.

The spelling of 315998017 in words is "three hundred fifteen million, nine hundred ninety-eight thousand, seventeen".