344439643 has 2 divisors, whose sum is σ = 344439644. Its totient is φ = 344439642.

The previous prime is 344439577. The next prime is 344439649. The reversal of 344439643 is 346934443.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 344439643 - 2²¹ = 342342491 is a prime.

It is equal to p_18520897 and since 344439643 and 18520897 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 344439596 and 344439605.

It is not a weakly prime, because it can be changed into another prime (344439649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172219821 + 172219822.

It is an arithmetic number, because the mean of its divisors is an integer number (172219822).

Almost surely, 2^344439643 is an apocalyptic number.

344439643 is a deficient number, since it is larger than the sum of its proper divisors (1).

344439643 is an equidigital number, since it uses as much as digits as its factorization.

344439643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 40.

The square root of 344439643 is about 18559.0851875840. The cubic root of 344439643 is about 700.9779819879.

The spelling of 344439643 in words is "three hundred forty-four million, four hundred thirty-nine thousand, six hundred forty-three".