12739973 has 2 divisors, whose sum is σ = 12739974. Its totient is φ = 12739972.

The previous prime is 12739943. The next prime is 12740003. The reversal of 12739973 is 37993721.

It is a balanced prime because it is at equal distance from previous prime (12739943) and next prime (12740003).

It can be written as a sum of positive squares in only one way, i.e., 8988004 + 3751969 = 2998^2 + 1937^2 .

It is an emirp because it is prime and its reverse (37993721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12739973 - 2⁸ = 12739717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12739973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12739943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6369986 + 6369987.

It is an arithmetic number, because the mean of its divisors is an integer number (6369987).

Almost surely, 2^12739973 is an apocalyptic number.

It is an amenable number.

12739973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739973 is an equidigital number, since it uses as much as digits as its factorization.

12739973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 41.

The square root of 12739973 is about 3569.3098772732. The cubic root of 12739973 is about 233.5551792585. Note that the first 3 decimals are identical.

The spelling of 12739973 in words is "twelve million, seven hundred thirty-nine thousand, nine hundred seventy-three".