304047421 has 2 divisors, whose sum is σ = 304047422. Its totient is φ = 304047420.

The previous prime is 304047391. The next prime is 304047427. The reversal of 304047421 is 124740403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154107396 + 149940025 = 12414^2 + 12245^2 .

It is an emirp because it is prime and its reverse (124740403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304047421 - 2⁹ = 304046909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304047427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152023710 + 152023711.

It is an arithmetic number, because the mean of its divisors is an integer number (152023711).

Almost surely, 2^304047421 is an apocalyptic number.

It is an amenable number.

304047421 is a deficient number, since it is larger than the sum of its proper divisors (1).

304047421 is an equidigital number, since it uses as much as digits as its factorization.

304047421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 304047421 is about 17436.9556115739. The cubic root of 304047421 is about 672.4300418744.

Adding to 304047421 its reverse (124740403), we get a palindrome (428787824).

The spelling of 304047421 in words is "three hundred four million, forty-seven thousand, four hundred twenty-one".