343342409 has 2 divisors, whose sum is σ = 343342410. Its totient is φ = 343342408.

The previous prime is 343342403. The next prime is 343342411. The reversal of 343342409 is 904243343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237252409 + 106090000 = 15403^2 + 10300^2 .

It is a cyclic number.

It is not a de Polignac number, because 343342409 - 2¹⁶ = 343276873 is a prime.

Together with 343342411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343342403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171671204 + 171671205.

It is an arithmetic number, because the mean of its divisors is an integer number (171671205).

Almost surely, 2^343342409 is an apocalyptic number.

It is an amenable number.

343342409 is a deficient number, since it is larger than the sum of its proper divisors (1).

343342409 is an equidigital number, since it uses as much as digits as its factorization.

343342409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 343342409 is about 18529.5010456299. The cubic root of 343342409 is about 700.2328538255.

The spelling of 343342409 in words is "three hundred forty-three million, three hundred forty-two thousand, four hundred nine".