304343340421 has 2 divisors, whose sum is σ = 304343340422. Its totient is φ = 304343340420.

The previous prime is 304343340401. The next prime is 304343340443. The reversal of 304343340421 is 124043343403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274340250625 + 30003089796 = 523775^2 + 173214^2 .

It is a cyclic number.

It is not a de Polignac number, because 304343340421 - 2¹³ = 304343332229 is a prime.

It is a super-2 number, since 2×304343340421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304343340401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152171670210 + 152171670211.

It is an arithmetic number, because the mean of its divisors is an integer number (152171670211).

Almost surely, 2^304343340421 is an apocalyptic number.

It is an amenable number.

304343340421 is a deficient number, since it is larger than the sum of its proper divisors (1).

304343340421 is an equidigital number, since it uses as much as digits as its factorization.

304343340421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 304343340421 its reverse (124043343403), we get a palindrome (428386683824).

The spelling of 304343340421 in words is "three hundred four billion, three hundred forty-three million, three hundred forty thousand, four hundred twenty-one".