304334021 has 4 divisors (see below), whose sum is σ = 311756844. Its totient is φ = 296911200.

The previous prime is 304333979. The next prime is 304334047. The reversal of 304334021 is 120433403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120433403 = 809 ⋅148867.

It can be written as a sum of positive squares in 2 ways, for example, as 153388225 + 150945796 = 12385^2 + 12286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304334021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 304333984 and 304334002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304334081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3711350 + ... + 3711431.

It is an arithmetic number, because the mean of its divisors is an integer number (77939211).

Almost surely, 2^304334021 is an apocalyptic number.

It is an amenable number.

304334021 is a deficient number, since it is larger than the sum of its proper divisors (7422823).

304334021 is an equidigital number, since it uses as much as digits as its factorization.

304334021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422822.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 304334021 is about 17445.1718535531. The cubic root of 304334021 is about 672.6412566556.

Adding to 304334021 its reverse (120433403), we get a palindrome (424767424).

It can be divided in two parts, 30433402 and 1, that added together give a palindrome (30433403).

The spelling of 304334021 in words is "three hundred four million, three hundred thirty-four thousand, twenty-one".