343321289 has 2 divisors, whose sum is σ = 343321290. Its totient is φ = 343321288.

The previous prime is 343321247. The next prime is 343321309. The reversal of 343321289 is 982123343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174451264 + 168870025 = 13208^2 + 12995^2 .

It is a cyclic number.

It is not a de Polignac number, because 343321289 - 2²⁴ = 326544073 is a prime.

It is a super-3 number, since 3×343321289³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343321189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171660644 + 171660645.

It is an arithmetic number, because the mean of its divisors is an integer number (171660645).

Almost surely, 2^343321289 is an apocalyptic number.

It is an amenable number.

343321289 is a deficient number, since it is larger than the sum of its proper divisors (1).

343321289 is an equidigital number, since it uses as much as digits as its factorization.

343321289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 343321289 is about 18528.9311348496. The cubic root of 343321289 is about 700.2184957379.

The spelling of 343321289 in words is "three hundred forty-three million, three hundred twenty-one thousand, two hundred eighty-nine".