304224493 has 2 divisors, whose sum is σ = 304224494. Its totient is φ = 304224492.

The previous prime is 304224463. The next prime is 304224499. The reversal of 304224493 is 394422403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282340809 + 21883684 = 16803^2 + 4678^2 .

It is an emirp because it is prime and its reverse (394422403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304224493 is a prime.

It is a super-2 number, since 2×304224493² = 185105084282214098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304224499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152112246 + 152112247.

It is an arithmetic number, because the mean of its divisors is an integer number (152112247).

Almost surely, 2^304224493 is an apocalyptic number.

It is an amenable number.

304224493 is a deficient number, since it is larger than the sum of its proper divisors (1).

304224493 is an equidigital number, since it uses as much as digits as its factorization.

304224493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 304224493 is about 17442.0323643777. The cubic root of 304224493 is about 672.5605537805.

Adding to 304224493 its reverse (394422403), we get a palindrome (698646896).

The spelling of 304224493 in words is "three hundred four million, two hundred twenty-four thousand, four hundred ninety-three".