1304220013 has 2 divisors, whose sum is σ = 1304220014. Its totient is φ = 1304220012.

The previous prime is 1304219977. The next prime is 1304220017. The reversal of 1304220013 is 3100224031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 803042244 + 501177769 = 28338^2 + 22387^2 .

It is an emirp because it is prime and its reverse (3100224031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304220013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304220017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652110006 + 652110007.

It is an arithmetic number, because the mean of its divisors is an integer number (652110007).

Almost surely, 2^1304220013 is an apocalyptic number.

It is an amenable number.

1304220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304220013 is an equidigital number, since it uses as much as digits as its factorization.

1304220013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1304220013 is about 36113.9863903170. The cubic root of 1304220013 is about 1092.5725542181.

Adding to 1304220013 its reverse (3100224031), we get a palindrome (4404444044).

The spelling of 1304220013 in words is "one billion, three hundred four million, two hundred twenty thousand, thirteen".