1313123303 has 4 divisors (see below), whose sum is σ = 1348613160. Its totient is φ = 1277633448.

The previous prime is 1313123297. The next prime is 1313123309. The reversal of 1313123303 is 3033213131.

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

It is an interprime number because it is at equal distance from previous prime (1313123297) and next prime (1313123309).

It is a cyclic number.

It is not a de Polignac number, because 1313123303 - 2¹⁴ = 1313106919 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 (1313123309) 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, 17744873 + ... + 17744946.

It is an arithmetic number, because the mean of its divisors is an integer number (337153290).

Almost surely, 2^1313123303 is an apocalyptic number.

1313123303 is a deficient number, since it is larger than the sum of its proper divisors (35489857).

1313123303 is an equidigital number, since it uses as much as digits as its factorization.

1313123303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35489856.

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

The square root of 1313123303 is about 36237.0432430683. The cubic root of 1313123303 is about 1095.0530761093.

Adding to 1313123303 its reverse (3033213131), we get a palindrome (4346336434).

The spelling of 1313123303 in words is "one billion, three hundred thirteen million, one hundred twenty-three thousand, three hundred three".