1313021403 has 12 divisors (see below), whose sum is σ = 1900653768. Its totient is φ = 873470400.

The previous prime is 1313021393. The next prime is 1313021407. The reversal of 1313021403 is 3041203131.

It is not a de Polignac number, because 1313021403 - 2⁸ = 1313021147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313021407) 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 11 ways as a sum of consecutive naturals, for example, 151998 + ... + 160403.

It is an arithmetic number, because the mean of its divisors is an integer number (158387814).

Almost surely, 2^1313021403 is an apocalyptic number.

1313021403 is a deficient number, since it is larger than the sum of its proper divisors (587632365).

1313021403 is a wasteful number, since it uses less digits than its factorization.

1313021403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312874 (or 312871 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1313021403 is about 36235.6371959981. The cubic root of 1313021403 is about 1095.0247495501.

Adding to 1313021403 its reverse (3041203131), we get a palindrome (4354224534).

The spelling of 1313021403 in words is "one billion, three hundred thirteen million, twenty-one thousand, four hundred three".