315745687 has 2 divisors, whose sum is σ = 315745688. Its totient is φ = 315745686.

The previous prime is 315745673. The next prime is 315745693. The reversal of 315745687 is 786547513.

It is a strong prime.

It is an emirp because it is prime and its reverse (786547513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315745687 - 2¹¹ = 315743639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315745637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157872843 + 157872844.

It is an arithmetic number, because the mean of its divisors is an integer number (157872844).

Almost surely, 2^315745687 is an apocalyptic number.

315745687 is a deficient number, since it is larger than the sum of its proper divisors (1).

315745687 is an equidigital number, since it uses as much as digits as its factorization.

315745687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 46.

The square root of 315745687 is about 17769.2342828834. The cubic root of 315745687 is about 680.9456903982.

The spelling of 315745687 in words is "three hundred fifteen million, seven hundred forty-five thousand, six hundred eighty-seven".