349547665 has 4 divisors (see below), whose sum is σ = 419457204. Its totient is φ = 279638128.

The previous prime is 349547663. The next prime is 349547669. The reversal of 349547665 is 566745943.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566745943 = 8803 ⋅64381.

It can be written as a sum of positive squares in 2 ways, for example, as 47900241 + 301647424 = 6921^2 + 17368^2 .

It is a cyclic number.

It is not a de Polignac number, because 349547665 - 2¹ = 349547663 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349547663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34954762 + ... + 34954771.

It is an arithmetic number, because the mean of its divisors is an integer number (104864301).

Almost surely, 2^349547665 is an apocalyptic number.

It is an amenable number.

349547665 is a deficient number, since it is larger than the sum of its proper divisors (69909539).

349547665 is an equidigital number, since it uses as much as digits as its factorization.

349547665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69909538.

The product of its digits is 2721600, while the sum is 49.

The square root of 349547665 is about 18696.1938639927. The cubic root of 349547665 is about 704.4261480520.

The spelling of 349547665 in words is "three hundred forty-nine million, five hundred forty-seven thousand, six hundred sixty-five".