304216399 has 2 divisors, whose sum is σ = 304216400. Its totient is φ = 304216398.

The previous prime is 304216397. The next prime is 304216403. The reversal of 304216399 is 993612403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 304216399 - 2¹ = 304216397 is a prime.

Together with 304216397, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304216397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152108199 + 152108200.

It is an arithmetic number, because the mean of its divisors is an integer number (152108200).

Almost surely, 2^304216399 is an apocalyptic number.

304216399 is a deficient number, since it is larger than the sum of its proper divisors (1).

304216399 is an equidigital number, since it uses as much as digits as its factorization.

304216399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 304216399 is about 17441.8003371212. The cubic root of 304216399 is about 672.5545891573.

The spelling of 304216399 in words is "three hundred four million, two hundred sixteen thousand, three hundred ninety-nine".