1312401663 has 8 divisors (see below), whose sum is σ = 1944298800. Its totient is φ = 874934424.

The previous prime is 1312401661. The next prime is 1312401691. The reversal of 1312401663 is 3661042131.

It is not a de Polignac number, because 1312401663 - 2¹ = 1312401661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 48607469 = 1312401663 / (1 + 3 + 1 + 2 + 4 + 0 + 1 + 6 + 6 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312401661) 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 7 ways as a sum of consecutive naturals, for example, 24303708 + ... + 24303761.

It is an arithmetic number, because the mean of its divisors is an integer number (243037350).

Almost surely, 2^1312401663 is an apocalyptic number.

1312401663 is a deficient number, since it is larger than the sum of its proper divisors (631897137).

1312401663 is an equidigital number, since it uses as much as digits as its factorization.

1312401663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48607478 (or 48607472 counting only the distinct ones).

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

The square root of 1312401663 is about 36227.0846605133. The cubic root of 1312401663 is about 1094.8524402399.

Adding to 1312401663 its reverse (3661042131), we get a palindrome (4973443794).

The spelling of 1312401663 in words is "one billion, three hundred twelve million, four hundred one thousand, six hundred sixty-three".