1304323217 has 2 divisors, whose sum is σ = 1304323218. Its totient is φ = 1304323216.

The previous prime is 1304323183. The next prime is 1304323219. The reversal of 1304323217 is 7123234031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223880256 + 80442961 = 34984^2 + 8969^2 .

It is an emirp because it is prime and its reverse (7123234031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1304323217 - 2⁸ = 1304322961 is a prime.

Together with 1304323219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1304323219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652161608 + 652161609.

It is an arithmetic number, because the mean of its divisors is an integer number (652161609).

Almost surely, 2^1304323217 is an apocalyptic number.

It is an amenable number.

1304323217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304323217 is an equidigital number, since it uses as much as digits as its factorization.

1304323217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 1304323217 is about 36115.4152267422. The cubic root of 1304323217 is about 1092.6013721790.

Adding to 1304323217 its reverse (7123234031), we get a palindrome (8427557248).

The spelling of 1304323217 in words is "one billion, three hundred four million, three hundred twenty-three thousand, two hundred seventeen".