304220387 has 2 divisors, whose sum is σ = 304220388. Its totient is φ = 304220386.

The previous prime is 304220377. The next prime is 304220437. The reversal of 304220387 is 783022403.

It is a weak prime.

It is an emirp because it is prime and its reverse (783022403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304220387 - 2¹⁸ = 303958243 is a prime.

It is not a weakly prime, because it can be changed into another prime (304220377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152110193 + 152110194.

It is an arithmetic number, because the mean of its divisors is an integer number (152110194).

Almost surely, 2^304220387 is an apocalyptic number.

304220387 is a deficient number, since it is larger than the sum of its proper divisors (1).

304220387 is an equidigital number, since it uses as much as digits as its factorization.

304220387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 304220387 is about 17441.9146598073. The cubic root of 304220387 is about 672.5575280039.

The spelling of 304220387 in words is "three hundred four million, two hundred twenty thousand, three hundred eighty-seven".