349085809 has 2 divisors, whose sum is σ = 349085810. Its totient is φ = 349085808.

The previous prime is 349085791. The next prime is 349085813. The reversal of 349085809 is 908580943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348643584 + 442225 = 18672^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 349085809 - 2⁵ = 349085777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349085839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174542904 + 174542905.

It is an arithmetic number, because the mean of its divisors is an integer number (174542905).

Almost surely, 2^349085809 is an apocalyptic number.

It is an amenable number.

349085809 is a deficient number, since it is larger than the sum of its proper divisors (1).

349085809 is an equidigital number, since it uses as much as digits as its factorization.

349085809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 349085809 is about 18683.8381763491. The cubic root of 349085809 is about 704.1157594435.

The spelling of 349085809 in words is "three hundred forty-nine million, eighty-five thousand, eight hundred nine".