315461609 has 2 divisors, whose sum is σ = 315461610. Its totient is φ = 315461608.

The previous prime is 315461581. The next prime is 315461633. The reversal of 315461609 is 906164513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218005225 + 97456384 = 14765^2 + 9872^2 .

It is an emirp because it is prime and its reverse (906164513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315461609 is a prime.

It is not a weakly prime, because it can be changed into another prime (315461659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157730804 + 157730805.

It is an arithmetic number, because the mean of its divisors is an integer number (157730805).

Almost surely, 2^315461609 is an apocalyptic number.

It is an amenable number.

315461609 is a deficient number, since it is larger than the sum of its proper divisors (1).

315461609 is an equidigital number, since it uses as much as digits as its factorization.

315461609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 315461609 is about 17761.2389489022. The cubic root of 315461609 is about 680.7414123560.

The spelling of 315461609 in words is "three hundred fifteen million, four hundred sixty-one thousand, six hundred nine".