12406531237 has 2 divisors, whose sum is σ = 12406531238. Its totient is φ = 12406531236.

The previous prime is 12406531217. The next prime is 12406531253. The reversal of 12406531237 is 73213560421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12002078916 + 404452321 = 109554^2 + 20111^2 .

It is an emirp because it is prime and its reverse (73213560421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12406531237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12406531217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6203265618 + 6203265619.

It is an arithmetic number, because the mean of its divisors is an integer number (6203265619).

Almost surely, 2^12406531237 is an apocalyptic number.

It is an amenable number.

12406531237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12406531237 is an equidigital number, since it uses as much as digits as its factorization.

12406531237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 12406531237 in words is "twelve billion, four hundred six million, five hundred thirty-one thousand, two hundred thirty-seven".