12831647 has 4 divisors (see below), whose sum is σ = 13144656. Its totient is φ = 12518640.

The previous prime is 12831641. The next prime is 12831653. The reversal of 12831647 is 74613821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74613821 = 1663 ⋅44867.

It is an interprime number because it is at equal distance from previous prime (12831641) and next prime (12831653).

It is a cyclic number.

It is not a de Polignac number, because 12831647 - 2⁸ = 12831391 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 (12831641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156443 + ... + 156524.

It is an arithmetic number, because the mean of its divisors is an integer number (3286164).

Almost surely, 2^12831647 is an apocalyptic number.

12831647 is a deficient number, since it is larger than the sum of its proper divisors (313009).

12831647 is an equidigital number, since it uses as much as digits as its factorization.

12831647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313008.

The product of its digits is 8064, while the sum is 32.

The square root of 12831647 is about 3582.1288363207. The cubic root of 12831647 is about 234.1140445382.

The spelling of 12831647 in words is "twelve million, eight hundred thirty-one thousand, six hundred forty-seven".