12427309 has 2 divisors, whose sum is σ = 12427310. Its totient is φ = 12427308.

The previous prime is 12427307. The next prime is 12427319. The reversal of 12427309 is 90372421.

12427309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11923209 + 504100 = 3453^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 12427309 - 2¹ = 12427307 is a prime.

Together with 12427307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12427307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6213654 + 6213655.

It is an arithmetic number, because the mean of its divisors is an integer number (6213655).

Almost surely, 2^12427309 is an apocalyptic number.

It is an amenable number.

12427309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12427309 is an equidigital number, since it uses as much as digits as its factorization.

12427309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 12427309 is about 3525.2388571556. The cubic root of 12427309 is about 231.6286978358.

The spelling of 12427309 in words is "twelve million, four hundred twenty-seven thousand, three hundred nine".