1312660631 has 2 divisors, whose sum is σ = 1312660632. Its totient is φ = 1312660630.

The previous prime is 1312660607. The next prime is 1312660637. The reversal of 1312660631 is 1360662131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312660631 is a prime.

It is a super-2 number, since 2×1312660631² = 3446155864354636322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312660594 and 1312660603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312660637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656330315 + 656330316.

It is an arithmetic number, because the mean of its divisors is an integer number (656330316).

Almost surely, 2^1312660631 is an apocalyptic number.

1312660631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312660631 is an equidigital number, since it uses as much as digits as its factorization.

1312660631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 1312660631 is about 36230.6587160653. The cubic root of 1312660631 is about 1094.9244489619.

The spelling of 1312660631 in words is "one billion, three hundred twelve million, six hundred sixty thousand, six hundred thirty-one".