12347857 has 2 divisors, whose sum is σ = 12347858. Its totient is φ = 12347856.

The previous prime is 12347851. The next prime is 12347897. The reversal of 12347857 is 75874321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12327121 + 20736 = 3511^2 + 144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12347857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12347851) 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, 6173928 + 6173929.

It is an arithmetic number, because the mean of its divisors is an integer number (6173929).

Almost surely, 2^12347857 is an apocalyptic number.

It is an amenable number.

12347857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12347857 is an equidigital number, since it uses as much as digits as its factorization.

12347857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 12347857 is about 3513.9517640400. The cubic root of 12347857 is about 231.1340151750.

The spelling of 12347857 in words is "twelve million, three hundred forty-seven thousand, eight hundred fifty-seven".