304357421 has 2 divisors, whose sum is σ = 304357422. Its totient is φ = 304357420.

The previous prime is 304357381. The next prime is 304357451. The reversal of 304357421 is 124753403.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286624900 + 17732521 = 16930^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 304357421 - 2²² = 300163117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304357451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152178710 + 152178711.

It is an arithmetic number, because the mean of its divisors is an integer number (152178711).

Almost surely, 2^304357421 is an apocalyptic number.

It is an amenable number.

304357421 is a deficient number, since it is larger than the sum of its proper divisors (1).

304357421 is an equidigital number, since it uses as much as digits as its factorization.

304357421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 304357421 is about 17445.8425133325. The cubic root of 304357421 is about 672.6584958303.

The spelling of 304357421 in words is "three hundred four million, three hundred fifty-seven thousand, four hundred twenty-one".