344402561 has 2 divisors, whose sum is σ = 344402562. Its totient is φ = 344402560.

The previous prime is 344402503. The next prime is 344402563. The reversal of 344402561 is 165204443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280897600 + 63504961 = 16760^2 + 7969^2 .

It is an emirp because it is prime and its reverse (165204443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 344402561 - 2¹⁴ = 344386177 is a prime.

It is a super-2 number, since 2×344402561² = 237226248046717442, which contains 22 as substring.

Together with 344402563, 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 (344402563) 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, 172201280 + 172201281.

It is an arithmetic number, because the mean of its divisors is an integer number (172201281).

Almost surely, 2^344402561 is an apocalyptic number.

It is an amenable number.

344402561 is a deficient number, since it is larger than the sum of its proper divisors (1).

344402561 is an equidigital number, since it uses as much as digits as its factorization.

344402561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 344402561 is about 18558.0861351595. The cubic root of 344402561 is about 700.9528255742.

The spelling of 344402561 in words is "three hundred forty-four million, four hundred two thousand, five hundred sixty-one".