344668217 has 4 divisors (see below), whose sum is σ = 364942836. Its totient is φ = 324393600.

The previous prime is 344668213. The next prime is 344668237. The reversal of 344668217 is 712866443.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289374121 + 55294096 = 17011^2 + 7436^2 .

It is a cyclic number.

It is not a de Polignac number, because 344668217 - 2² = 344668213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344668213) 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, 10137284 + ... + 10137317.

It is an arithmetic number, because the mean of its divisors is an integer number (91235709).

Almost surely, 2^344668217 is an apocalyptic number.

It is an amenable number.

344668217 is a deficient number, since it is larger than the sum of its proper divisors (20274619).

344668217 is a wasteful number, since it uses less digits than its factorization.

344668217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20274618.

The product of its digits is 193536, while the sum is 41.

The square root of 344668217 is about 18565.2421745583. The cubic root of 344668217 is about 701.1330066442.

The spelling of 344668217 in words is "three hundred forty-four million, six hundred sixty-eight thousand, two hundred seventeen".