11724217 has 2 divisors, whose sum is σ = 11724218. Its totient is φ = 11724216.

The previous prime is 11724211. The next prime is 11724239. The reversal of 11724217 is 71242711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11723776 + 441 = 3424^2 + 21^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11724217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11724191 and 11724200.

It is not a weakly prime, because it can be changed into another prime (11724211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5862108 + 5862109.

It is an arithmetic number, because the mean of its divisors is an integer number (5862109).

Almost surely, 2^11724217 is an apocalyptic number.

It is an amenable number.

11724217 is a deficient number, since it is larger than the sum of its proper divisors (1).

11724217 is an equidigital number, since it uses as much as digits as its factorization.

11724217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 784, while the sum is 25.

The square root of 11724217 is about 3424.0643977589. The cubic root of 11724217 is about 227.1753902066.

Adding to 11724217 its reverse (71242711), we get a palindrome (82966928).

The spelling of 11724217 in words is "eleven million, seven hundred twenty-four thousand, two hundred seventeen".