304042381 has 2 divisors, whose sum is σ = 304042382. Its totient is φ = 304042380.

The previous prime is 304042373. The next prime is 304042439. The reversal of 304042381 is 183240403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224100900 + 79941481 = 14970^2 + 8941^2 .

It is an emirp because it is prime and its reverse (183240403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304042381 - 2³ = 304042373 is a prime.

It is a super-2 number, since 2×304042381² = 184883538888298322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304046381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152021190 + 152021191.

It is an arithmetic number, because the mean of its divisors is an integer number (152021191).

Almost surely, 2^304042381 is an apocalyptic number.

It is an amenable number.

304042381 is a deficient number, since it is larger than the sum of its proper divisors (1).

304042381 is an equidigital number, since it uses as much as digits as its factorization.

304042381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 304042381 is about 17436.8110903341. The cubic root of 304042381 is about 672.4263263727.

Adding to 304042381 its reverse (183240403), we get a palindrome (487282784).

The spelling of 304042381 in words is "three hundred four million, forty-two thousand, three hundred eighty-one".