313509617 has 2 divisors, whose sum is σ = 313509618. Its totient is φ = 313509616.

The previous prime is 313509613. The next prime is 313509653. The reversal of 313509617 is 716905313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313148416 + 361201 = 17696^2 + 601^2 .

It is an emirp because it is prime and its reverse (716905313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313509617 - 2² = 313509613 is a prime.

It is not a weakly prime, because it can be changed into another prime (313509611) 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, 156754808 + 156754809.

It is an arithmetic number, because the mean of its divisors is an integer number (156754809).

Almost surely, 2^313509617 is an apocalyptic number.

It is an amenable number.

313509617 is a deficient number, since it is larger than the sum of its proper divisors (1).

313509617 is an equidigital number, since it uses as much as digits as its factorization.

313509617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 313509617 is about 17706.2027832057. The cubic root of 313509617 is about 679.3344244475.

The spelling of 313509617 in words is "three hundred thirteen million, five hundred nine thousand, six hundred seventeen".