1313321303 has 4 divisors (see below), whose sum is σ = 1500938640. Its totient is φ = 1125703968.

The previous prime is 1313321279. The next prime is 1313321309. The reversal of 1313321303 is 3031233131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313321303 - 2¹⁰ = 1313320279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313321309) 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 3 ways as a sum of consecutive naturals, for example, 93808658 + ... + 93808671.

It is an arithmetic number, because the mean of its divisors is an integer number (375234660).

Almost surely, 2^1313321303 is an apocalyptic number.

1313321303 is a deficient number, since it is larger than the sum of its proper divisors (187617337).

1313321303 is an equidigital number, since it uses as much as digits as its factorization.

1313321303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187617336.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1313321303 is about 36239.7751510685. The cubic root of 1313321303 is about 1095.1081127312.

Adding to 1313321303 its reverse (3031233131), we get a palindrome (4344554434).

The spelling of 1313321303 in words is "one billion, three hundred thirteen million, three hundred twenty-one thousand, three hundred three".