12694738237 has 2 divisors, whose sum is σ = 12694738238. Its totient is φ = 12694738236.

The previous prime is 12694738213. The next prime is 12694738249. The reversal of 12694738237 is 73283749621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11727590436 + 967147801 = 108294^2 + 31099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12694738237 is a prime.

It is a super-2 number, since 2×12694738237² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12694738207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347369118 + 6347369119.

It is an arithmetic number, because the mean of its divisors is an integer number (6347369119).

Almost surely, 2^12694738237 is an apocalyptic number.

It is an amenable number.

12694738237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694738237 is an equidigital number, since it uses as much as digits as its factorization.

12694738237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 52.

The spelling of 12694738237 in words is "twelve billion, six hundred ninety-four million, seven hundred thirty-eight thousand, two hundred thirty-seven".