12731723 has 2 divisors, whose sum is σ = 12731724. Its totient is φ = 12731722.

The previous prime is 12731707. The next prime is 12731743. The reversal of 12731723 is 32713721.

It is a weak prime.

It is an emirp because it is prime and its reverse (32713721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12731723 - 2⁴ = 12731707 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12731692 and 12731701.

It is not a weakly prime, because it can be changed into another prime (12731743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6365861 + 6365862.

It is an arithmetic number, because the mean of its divisors is an integer number (6365862).

Almost surely, 2^12731723 is an apocalyptic number.

12731723 is a deficient number, since it is larger than the sum of its proper divisors (1).

12731723 is an equidigital number, since it uses as much as digits as its factorization.

12731723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1764, while the sum is 26.

The square root of 12731723 is about 3568.1540045239. The cubic root of 12731723 is about 233.5047540785.

The spelling of 12731723 in words is "twelve million, seven hundred thirty-one thousand, seven hundred twenty-three".