12739847 has 2 divisors, whose sum is σ = 12739848. Its totient is φ = 12739846.

The previous prime is 12739841. The next prime is 12739871. The reversal of 12739847 is 74893721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12739847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12739841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369923 + 6369924.

It is an arithmetic number, because the mean of its divisors is an integer number (6369924).

Almost surely, 2^12739847 is an apocalyptic number.

12739847 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739847 is an equidigital number, since it uses as much as digits as its factorization.

12739847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 12739847 is about 3569.2922267587. The cubic root of 12739847 is about 233.5544092922.

The spelling of 12739847 in words is "twelve million, seven hundred thirty-nine thousand, eight hundred forty-seven".