12409387 has 2 divisors, whose sum is σ = 12409388. Its totient is φ = 12409386.

The previous prime is 12409381. The next prime is 12409391. The reversal of 12409387 is 78390421.

It is a strong prime.

It is an emirp because it is prime and its reverse (78390421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12409387 - 2³ = 12409379 is a prime.

It is not a weakly prime, because it can be changed into another prime (12409381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6204693 + 6204694.

It is an arithmetic number, because the mean of its divisors is an integer number (6204694).

Almost surely, 2^12409387 is an apocalyptic number.

12409387 is a deficient number, since it is larger than the sum of its proper divisors (1).

12409387 is an equidigital number, since it uses as much as digits as its factorization.

12409387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 12409387 is about 3522.6959846118. The cubic root of 12409387 is about 231.5172967622.

The spelling of 12409387 in words is "twelve million, four hundred nine thousand, three hundred eighty-seven".