1313531663 has 8 divisors (see below), whose sum is σ = 1325191680. Its totient is φ = 1301892480.

The previous prime is 1313531651. The next prime is 1313531677. The reversal of 1313531663 is 3661353131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1313531663 - 2⁴ = 1313531647 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 (1313531603) 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 7 ways as a sum of consecutive naturals, for example, 138803 + ... + 147963.

It is an arithmetic number, because the mean of its divisors is an integer number (165648960).

Almost surely, 2^1313531663 is an apocalyptic number.

1313531663 is a deficient number, since it is larger than the sum of its proper divisors (11660017).

1313531663 is a wasteful number, since it uses less digits than its factorization.

1313531663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10417.

The product of its digits is 14580, while the sum is 32.

The square root of 1313531663 is about 36242.6773707462. The cubic root of 1313531663 is about 1095.1665789124.

Adding to 1313531663 its reverse (3661353131), we get a palindrome (4974884794).

The spelling of 1313531663 in words is "one billion, three hundred thirteen million, five hundred thirty-one thousand, six hundred sixty-three".