349393729 has 4 divisors (see below), whose sum is σ = 353603376. Its totient is φ = 345184084.

The previous prime is 349393669. The next prime is 349393739. The reversal of 349393729 is 927393943.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 349393729 - 2⁷ = 349393601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349393739) 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 in 3 ways as a sum of consecutive naturals, for example, 2104699 + ... + 2104864.

It is an arithmetic number, because the mean of its divisors is an integer number (88400844).

Almost surely, 2^349393729 is an apocalyptic number.

It is an amenable number.

349393729 is a deficient number, since it is larger than the sum of its proper divisors (4209647).

349393729 is an equidigital number, since it uses as much as digits as its factorization.

349393729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4209646.

The product of its digits is 1102248, while the sum is 49.

The square root of 349393729 is about 18692.0766369069. The cubic root of 349393729 is about 704.3227263290.

The spelling of 349393729 in words is "three hundred forty-nine million, three hundred ninety-three thousand, seven hundred twenty-nine".