1304138813 has 2 divisors, whose sum is σ = 1304138814. Its totient is φ = 1304138812.

The previous prime is 1304138807. The next prime is 1304138837. The reversal of 1304138813 is 3188314031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164379129 + 139759684 = 34123^2 + 11822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304138813 - 2⁶ = 1304138749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1304138813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1304168813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652069406 + 652069407.

It is an arithmetic number, because the mean of its divisors is an integer number (652069407).

Almost surely, 2^1304138813 is an apocalyptic number.

It is an amenable number.

1304138813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304138813 is an equidigital number, since it uses as much as digits as its factorization.

1304138813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1304138813 is about 36112.8621546396. The cubic root of 1304138813 is about 1092.5498794312.

The spelling of 1304138813 in words is "one billion, three hundred four million, one hundred thirty-eight thousand, eight hundred thirteen".