1304321313 has 16 divisors (see below), whose sum is σ = 1804118400. Its totient is φ = 837204480.

The previous prime is 1304321309. The next prime is 1304321323. The reversal of 1304321313 is 3131234031.

It is not a de Polignac number, because 1304321313 - 2² = 1304321309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1304321313.

It is not an unprimeable number, because it can be changed into a prime (1304321323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10353 + ... + 52113.

It is an arithmetic number, because the mean of its divisors is an integer number (112757400).

Almost surely, 2^1304321313 is an apocalyptic number.

It is an amenable number.

1304321313 is a deficient number, since it is larger than the sum of its proper divisors (499797087).

1304321313 is a wasteful number, since it uses less digits than its factorization.

1304321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42152.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1304321313 is about 36115.3888667975. The cubic root of 1304321313 is about 1092.6008405331.

Adding to 1304321313 its reverse (3131234031), we get a palindrome (4435555344).

The spelling of 1304321313 in words is "one billion, three hundred four million, three hundred twenty-one thousand, three hundred thirteen".