12694737893 has 2 divisors, whose sum is σ = 12694737894. Its totient is φ = 12694737892.

The previous prime is 12694737889. The next prime is 12694737899. The reversal of 12694737893 is 39873749621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11830260289 + 864477604 = 108767^2 + 29402^2 .

It is an emirp because it is prime and its reverse (39873749621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12694737893 - 2² = 12694737889 is a prime.

It is a super-2 number, since 2×12694737893² (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 (12694737899) 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, 6347368946 + 6347368947.

It is an arithmetic number, because the mean of its divisors is an integer number (6347368947).

Almost surely, 2^12694737893 is an apocalyptic number.

It is an amenable number.

12694737893 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694737893 is an equidigital number, since it uses as much as digits as its factorization.

12694737893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13716864, while the sum is 59.

The spelling of 12694737893 in words is "twelve billion, six hundred ninety-four million, seven hundred thirty-seven thousand, eight hundred ninety-three".