314391809 has 2 divisors, whose sum is σ = 314391810. Its totient is φ = 314391808.

The previous prime is 314391769. The next prime is 314391811. The reversal of 314391809 is 908193413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261145600 + 53246209 = 16160^2 + 7297^2 .

It is a cyclic number.

It is not a de Polignac number, because 314391809 - 2²⁴ = 297614593 is a prime.

It is a Sophie Germain prime.

Together with 314391811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (314393809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157195904 + 157195905.

It is an arithmetic number, because the mean of its divisors is an integer number (157195905).

Almost surely, 2^314391809 is an apocalyptic number.

It is an amenable number.

314391809 is a deficient number, since it is larger than the sum of its proper divisors (1).

314391809 is an equidigital number, since it uses as much as digits as its factorization.

314391809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 314391809 is about 17731.0972305721. The cubic root of 314391809 is about 679.9710260146.

The spelling of 314391809 in words is "three hundred fourteen million, three hundred ninety-one thousand, eight hundred nine".