304669021 has 2 divisors, whose sum is σ = 304669022. Its totient is φ = 304669020.

The previous prime is 304669007. The next prime is 304669031. The reversal of 304669021 is 120966403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196280100 + 108388921 = 14010^2 + 10411^2 .

It is an emirp because it is prime and its reverse (120966403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304669021 - 2⁷ = 304668893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304669031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152334510 + 152334511.

It is an arithmetic number, because the mean of its divisors is an integer number (152334511).

Almost surely, 2^304669021 is an apocalyptic number.

It is an amenable number.

304669021 is a deficient number, since it is larger than the sum of its proper divisors (1).

304669021 is an equidigital number, since it uses as much as digits as its factorization.

304669021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 304669021 is about 17454.7707232149. The cubic root of 304669021 is about 672.8879726276.

The spelling of 304669021 in words is "three hundred four million, six hundred sixty-nine thousand, twenty-one".