12731647 has 2 divisors, whose sum is σ = 12731648. Its totient is φ = 12731646.

The previous prime is 12731639. The next prime is 12731659. The reversal of 12731647 is 74613721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12731647 - 2³ = 12731639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12731447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6365823 + 6365824.

It is an arithmetic number, because the mean of its divisors is an integer number (6365824).

Almost surely, 2^12731647 is an apocalyptic number.

12731647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12731647 is an equidigital number, since it uses as much as digits as its factorization.

12731647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 12731647 is about 3568.1433547435. The cubic root of 12731647 is about 233.5042894544.

The spelling of 12731647 in words is "twelve million, seven hundred thirty-one thousand, six hundred forty-seven".