343443409 has 2 divisors, whose sum is σ = 343443410. Its totient is φ = 343443408.

The previous prime is 343443379. The next prime is 343443427. The reversal of 343443409 is 904344343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319158225 + 24285184 = 17865^2 + 4928^2 .

It is a cyclic number.

It is not a de Polignac number, because 343443409 - 2¹³ = 343435217 is a prime.

It is not a weakly prime, because it can be changed into another prime (343443109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171721704 + 171721705.

It is an arithmetic number, because the mean of its divisors is an integer number (171721705).

Almost surely, 2^343443409 is an apocalyptic number.

It is an amenable number.

343443409 is a deficient number, since it is larger than the sum of its proper divisors (1).

343443409 is an equidigital number, since it uses as much as digits as its factorization.

343443409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 343443409 is about 18532.2262289235. The cubic root of 343443409 is about 700.3015088888.

It can be divided in two parts, 34 and 3443409, that added together give a palindrome (3443443).

The spelling of 343443409 in words is "three hundred forty-three million, four hundred forty-three thousand, four hundred nine".