1312646013 has 16 divisors (see below), whose sum is σ = 2222469760. Its totient is φ = 750083328.

The previous prime is 1312645991. The next prime is 1312646021. The reversal of 1312646013 is 3106462131.

1312646013 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 646 + 0 + 13 = 666.

It is not a de Polignac number, because 1312646013 - 2²⁰ = 1311597437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312646213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3472420 + ... + 3472797.

It is an arithmetic number, because the mean of its divisors is an integer number (138904360).

Almost surely, 2^1312646013 is an apocalyptic number.

It is an amenable number.

1312646013 is a deficient number, since it is larger than the sum of its proper divisors (909823747).

1312646013 is an equidigital number, since it uses as much as digits as its factorization.

1312646013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945233 (or 6945227 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1312646013 is about 36230.4569802811. The cubic root of 1312646013 is about 1094.9203845286.

The spelling of 1312646013 in words is "one billion, three hundred twelve million, six hundred forty-six thousand, thirteen".