313650809 has 2 divisors, whose sum is σ = 313650810. Its totient is φ = 313650808.

The previous prime is 313650797. The next prime is 313650829. The reversal of 313650809 is 908056313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161671225 + 151979584 = 12715^2 + 12328^2 .

It is an emirp because it is prime and its reverse (908056313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313650809 - 2²⁴ = 296873593 is a prime.

It is not a weakly prime, because it can be changed into another prime (313650829) 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, 156825404 + 156825405.

It is an arithmetic number, because the mean of its divisors is an integer number (156825405).

Almost surely, 2^313650809 is an apocalyptic number.

It is an amenable number.

313650809 is a deficient number, since it is larger than the sum of its proper divisors (1).

313650809 is an equidigital number, since it uses as much as digits as its factorization.

313650809 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 313650809 is about 17710.1894117483. The cubic root of 313650809 is about 679.4363906876.

The spelling of 313650809 in words is "three hundred thirteen million, six hundred fifty thousand, eight hundred nine".