344345621 has 2 divisors, whose sum is σ = 344345622. Its totient is φ = 344345620.

The previous prime is 344345597. The next prime is 344345633. The reversal of 344345621 is 126543443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336722500 + 7623121 = 18350^2 + 2761^2 .

It is a cyclic number.

It is not a de Polignac number, because 344345621 - 2¹⁰ = 344344597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344345321) 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, 172172810 + 172172811.

It is an arithmetic number, because the mean of its divisors is an integer number (172172811).

Almost surely, 2^344345621 is an apocalyptic number.

It is an amenable number.

344345621 is a deficient number, since it is larger than the sum of its proper divisors (1).

344345621 is an equidigital number, since it uses as much as digits as its factorization.

344345621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 32.

The square root of 344345621 is about 18556.5519695875. The cubic root of 344345621 is about 700.9141939861.

The spelling of 344345621 in words is "three hundred forty-four million, three hundred forty-five thousand, six hundred twenty-one".