349804109 has 2 divisors, whose sum is σ = 349804110. Its totient is φ = 349804108.

The previous prime is 349804099. The next prime is 349804123. The reversal of 349804109 is 901408943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 157427209 = 13870^2 + 12547^2 .

It is a cyclic number.

It is not a de Polignac number, because 349804109 - 2²⁸ = 81368653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349804129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174902054 + 174902055.

It is an arithmetic number, because the mean of its divisors is an integer number (174902055).

Almost surely, 2^349804109 is an apocalyptic number.

It is an amenable number.

349804109 is a deficient number, since it is larger than the sum of its proper divisors (1).

349804109 is an equidigital number, since it uses as much as digits as its factorization.

349804109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 349804109 is about 18703.0507939213. The cubic root of 349804109 is about 704.5983722516.

The spelling of 349804109 in words is "three hundred forty-nine million, eight hundred four thousand, one hundred nine".