315719009 has 2 divisors, whose sum is σ = 315719010. Its totient is φ = 315719008.

The previous prime is 315718987. The next prime is 315719017. The reversal of 315719009 is 900917513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301126609 + 14592400 = 17353^2 + 3820^2 .

It is an emirp because it is prime and its reverse (900917513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315719009 - 2¹² = 315714913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 315719009.

It is not a weakly prime, because it can be changed into another prime (315719909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157859504 + 157859505.

It is an arithmetic number, because the mean of its divisors is an integer number (157859505).

Almost surely, 2^315719009 is an apocalyptic number.

It is an amenable number.

315719009 is a deficient number, since it is larger than the sum of its proper divisors (1).

315719009 is an equidigital number, since it uses as much as digits as its factorization.

315719009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 315719009 is about 17768.4835875209. The cubic root of 315719009 is about 680.9265116925.

The spelling of 315719009 in words is "three hundred fifteen million, seven hundred nineteen thousand, nine".