344421809 has 2 divisors, whose sum is σ = 344421810. Its totient is φ = 344421808.

The previous prime is 344421773. The next prime is 344421821. The reversal of 344421809 is 908124443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238393600 + 106028209 = 15440^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 344421809 - 2²⁸ = 75986353 is a prime.

It is not a weakly prime, because it can be changed into another prime (344421829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172210904 + 172210905.

It is an arithmetic number, because the mean of its divisors is an integer number (172210905).

Almost surely, 2^344421809 is an apocalyptic number.

It is an amenable number.

344421809 is a deficient number, since it is larger than the sum of its proper divisors (1).

344421809 is an equidigital number, since it uses as much as digits as its factorization.

344421809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 344421809 is about 18558.6047158724. The cubic root of 344421809 is about 700.9658836350.

The spelling of 344421809 in words is "three hundred forty-four million, four hundred twenty-one thousand, eight hundred nine".