12722317 has 2 divisors, whose sum is σ = 12722318. Its totient is φ = 12722316.

The previous prime is 12722293. The next prime is 12722321. The reversal of 12722317 is 71322721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11600836 + 1121481 = 3406^2 + 1059^2 .

It is an emirp because it is prime and its reverse (71322721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12722317 - 2⁷ = 12722189 is a prime.

It is equal to p₈₃₂₃₀₉ and since 12722317 and 832309 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 12722291 and 12722300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12722357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6361158 + 6361159.

It is an arithmetic number, because the mean of its divisors is an integer number (6361159).

Almost surely, 2^12722317 is an apocalyptic number.

It is an amenable number.

12722317 is a deficient number, since it is larger than the sum of its proper divisors (1).

12722317 is an equidigital number, since it uses as much as digits as its factorization.

12722317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 25.

The square root of 12722317 is about 3566.8357125049. The cubic root of 12722317 is about 233.4472366785.

The spelling of 12722317 in words is "twelve million, seven hundred twenty-two thousand, three hundred seventeen".