349161809 has 2 divisors, whose sum is σ = 349161810. Its totient is φ = 349161808.

The previous prime is 349161739. The next prime is 349161821. The reversal of 349161809 is 908161943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225840784 + 123321025 = 15028^2 + 11105^2 .

It is a cyclic number.

It is not a de Polignac number, because 349161809 - 2¹⁶ = 349096273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349161209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174580904 + 174580905.

It is an arithmetic number, because the mean of its divisors is an integer number (174580905).

Almost surely, 2^349161809 is an apocalyptic number.

It is an amenable number.

349161809 is a deficient number, since it is larger than the sum of its proper divisors (1).

349161809 is an equidigital number, since it uses as much as digits as its factorization.

349161809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 349161809 is about 18685.8719090119. The cubic root of 349161809 is about 704.1668537718.

The spelling of 349161809 in words is "three hundred forty-nine million, one hundred sixty-one thousand, eight hundred nine".