343005665 has 8 divisors (see below), whose sum is σ = 419373288. Its totient is φ = 269226880.

The previous prime is 343005659. The next prime is 343005697. The reversal of 343005665 is 566500343.

It can be written as a sum of positive squares in 4 ways, for example, as 18861649 + 324144016 = 4343^2 + 18004^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 343005665 - 2¹² = 343001569 is a prime.

It is a super-3 number, since 3×343005665³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646916 + ... + 647445.

It is an arithmetic number, because the mean of its divisors is an integer number (52421661).

Almost surely, 2^343005665 is an apocalyptic number.

It is an amenable number.

343005665 is a deficient number, since it is larger than the sum of its proper divisors (76367623).

343005665 is a wasteful number, since it uses less digits than its factorization.

343005665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294419.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 343005665 is about 18520.4121174449. The cubic root of 343005665 is about 700.0038537203.

The spelling of 343005665 in words is "three hundred forty-three million, five thousand, six hundred sixty-five".