12387937 has 2 divisors, whose sum is σ = 12387938. Its totient is φ = 12387936.

The previous prime is 12387887. The next prime is 12387971. The reversal of 12387937 is 73978321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8242641 + 4145296 = 2871^2 + 2036^2 .

It is an emirp because it is prime and its reverse (73978321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12387937 - 2¹⁵ = 12355169 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12387937.

It is not a weakly prime, because it can be changed into another prime (12387737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6193968 + 6193969.

It is an arithmetic number, because the mean of its divisors is an integer number (6193969).

Almost surely, 2^12387937 is an apocalyptic number.

It is an amenable number.

12387937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12387937 is an equidigital number, since it uses as much as digits as its factorization.

12387937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 12387937 is about 3519.6501246573. The cubic root of 12387937 is about 231.3838249507.

The spelling of 12387937 in words is "twelve million, three hundred eighty-seven thousand, nine hundred thirty-seven".