343222409 has 2 divisors, whose sum is σ = 343222410. Its totient is φ = 343222408.

The previous prime is 343222381. The next prime is 343222427. The reversal of 343222409 is 904222343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290804809 + 52417600 = 17053^2 + 7240^2 .

It is an emirp because it is prime and its reverse (904222343) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343222409 is a prime.

It is not a weakly prime, because it can be changed into another prime (343222459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171611204 + 171611205.

It is an arithmetic number, because the mean of its divisors is an integer number (171611205).

Almost surely, 2^343222409 is an apocalyptic number.

It is an amenable number.

343222409 is a deficient number, since it is larger than the sum of its proper divisors (1).

343222409 is an equidigital number, since it uses as much as digits as its factorization.

343222409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 343222409 is about 18526.2626830130. The cubic root of 343222409 is about 700.1512659494.

The spelling of 343222409 in words is "three hundred forty-three million, two hundred twenty-two thousand, four hundred nine".