349712305 has 12 divisors (see below), whose sum is σ = 434405340. Its totient is φ = 269948672.

The previous prime is 349712281. The next prime is 349712317. The reversal of 349712305 is 503217943.

It can be written as a sum of positive squares in 6 ways, for example, as 86266944 + 263445361 = 9288^2 + 16231^2 .

It is not a de Polignac number, because 349712305 - 2⁷ = 349712177 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224409 + ... + 225961.

It is an arithmetic number, because the mean of its divisors is an integer number (36200445).

Almost surely, 2^349712305 is an apocalyptic number.

It is an amenable number.

349712305 is a deficient number, since it is larger than the sum of its proper divisors (84693035).

349712305 is an frugal number, since it uses more digits than its factorization.

349712305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 349712305 is about 18700.5963808644. The cubic root of 349712305 is about 704.5367276465.

The spelling of 349712305 in words is "three hundred forty-nine million, seven hundred twelve thousand, three hundred five".