343803321 has 6 divisors (see below), whose sum is σ = 496604810. Its totient is φ = 229202208.

The previous prime is 343803307. The next prime is 343803329. The reversal of 343803321 is 123308343.

It can be written as a sum of positive squares in only one way, i.e., 252333225 + 91470096 = 15885^2 + 9564^2 .

It is not a de Polignac number, because 343803321 - 2⁷ = 343803193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343803329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19100176 + ... + 19100193.

Almost surely, 2^343803321 is an apocalyptic number.

It is an amenable number.

343803321 is a deficient number, since it is larger than the sum of its proper divisors (152801489).

343803321 is a wasteful number, since it uses less digits than its factorization.

343803321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38200375 (or 38200372 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 343803321 is about 18541.9341224156. The cubic root of 343803321 is about 700.5460508007.

The spelling of 343803321 in words is "three hundred forty-three million, eight hundred three thousand, three hundred twenty-one".