344278369 has 2 divisors, whose sum is σ = 344278370. Its totient is φ = 344278368.

The previous prime is 344278367. The next prime is 344278387. The reversal of 344278369 is 963872443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319158225 + 25120144 = 17865^2 + 5012^2 .

It is a cyclic number.

It is not a de Polignac number, because 344278369 - 2¹ = 344278367 is a prime.

It is a super-2 number, since 2×344278369² = 237055190722600322, which contains 22 as substring.

Together with 344278367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (344278367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172139184 + 172139185.

It is an arithmetic number, because the mean of its divisors is an integer number (172139185).

Almost surely, 2^344278369 is an apocalyptic number.

It is an amenable number.

344278369 is a deficient number, since it is larger than the sum of its proper divisors (1).

344278369 is an equidigital number, since it uses as much as digits as its factorization.

344278369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 46.

The square root of 344278369 is about 18554.7397987684. The cubic root of 344278369 is about 700.8685606190.

The spelling of 344278369 in words is "three hundred forty-four million, two hundred seventy-eight thousand, three hundred sixty-nine".