304304381 has 2 divisors, whose sum is σ = 304304382. Its totient is φ = 304304380.

The previous prime is 304304327. The next prime is 304304383. The reversal of 304304381 is 183403403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271425625 + 32878756 = 16475^2 + 5734^2 .

It is a cyclic number.

It is not a de Polignac number, because 304304381 - 2¹⁰ = 304303357 is a prime.

It is a super-2 number, since 2×304304381² = 185202312591586322, which contains 22 as substring.

Together with 304304383, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 304304381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304304383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152152190 + 152152191.

It is an arithmetic number, because the mean of its divisors is an integer number (152152191).

Almost surely, 2^304304381 is an apocalyptic number.

It is an amenable number.

304304381 is a deficient number, since it is larger than the sum of its proper divisors (1).

304304381 is an equidigital number, since it uses as much as digits as its factorization.

304304381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 304304381 is about 17444.3223141514. The cubic root of 304304381 is about 672.6194190992.

Adding to 304304381 its reverse (183403403), we get a palindrome (487707784).

The spelling of 304304381 in words is "three hundred four million, three hundred four thousand, three hundred eighty-one".