349965409 has 2 divisors, whose sum is σ = 349965410. Its totient is φ = 349965408.

The previous prime is 349965397. The next prime is 349965439. The reversal of 349965409 is 904569943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321843600 + 28121809 = 17940^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 349965409 - 2⁹ = 349964897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349965439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174982704 + 174982705.

It is an arithmetic number, because the mean of its divisors is an integer number (174982705).

Almost surely, 2^349965409 is an apocalyptic number.

It is an amenable number.

349965409 is a deficient number, since it is larger than the sum of its proper divisors (1).

349965409 is an equidigital number, since it uses as much as digits as its factorization.

349965409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 349965409 is about 18707.3624276647. The cubic root of 349965409 is about 704.7066559549.

The spelling of 349965409 in words is "three hundred forty-nine million, nine hundred sixty-five thousand, four hundred nine".