11722817 has 2 divisors, whose sum is σ = 11722818. Its totient is φ = 11722816.

The previous prime is 11722811. The next prime is 11722819. The reversal of 11722817 is 71822711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 1635841 = 3176^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 11722817 - 2¹⁰ = 11721793 is a prime.

Together with 11722819, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11722817.

It is not a weakly prime, because it can be changed into another prime (11722811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5861408 + 5861409.

It is an arithmetic number, because the mean of its divisors is an integer number (5861409).

Almost surely, 2^11722817 is an apocalyptic number.

It is an amenable number.

11722817 is a deficient number, since it is larger than the sum of its proper divisors (1).

11722817 is an equidigital number, since it uses as much as digits as its factorization.

11722817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 29.

The square root of 11722817 is about 3423.8599562482. The cubic root of 11722817 is about 227.1663474362.

The spelling of 11722817 in words is "eleven million, seven hundred twenty-two thousand, eight hundred seventeen".