12247709 has 2 divisors, whose sum is σ = 12247710. Its totient is φ = 12247708.

The previous prime is 12247681. The next prime is 12247747. The reversal of 12247709 is 90774221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9132484 + 3115225 = 3022^2 + 1765^2 .

It is an emirp because it is prime and its reverse (90774221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12247709 - 2⁸ = 12247453 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 (12247409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6123854 + 6123855.

It is an arithmetic number, because the mean of its divisors is an integer number (6123855).

Almost surely, 2^12247709 is an apocalyptic number.

It is an amenable number.

12247709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12247709 is an equidigital number, since it uses as much as digits as its factorization.

12247709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 12247709 is about 3499.6726989820. The cubic root of 12247709 is about 230.5074429457.

The spelling of 12247709 in words is "twelve million, two hundred forty-seven thousand, seven hundred nine".