11822857 has 2 divisors, whose sum is σ = 11822858. Its totient is φ = 11822856.

The previous prime is 11822821. The next prime is 11822911. The reversal of 11822857 is 75822811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 4309776 = 2741^2 + 2076^2 .

It is an emirp because it is prime and its reverse (75822811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11822857 - 2⁷ = 11822729 is a prime.

It is not a weakly prime, because it can be changed into another prime (11822957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5911428 + 5911429.

It is an arithmetic number, because the mean of its divisors is an integer number (5911429).

Almost surely, 2^11822857 is an apocalyptic number.

It is an amenable number.

11822857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11822857 is an equidigital number, since it uses as much as digits as its factorization.

11822857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 34.

The square root of 11822857 is about 3438.4381628873. The cubic root of 11822857 is about 227.8107141920.

The spelling of 11822857 in words is "eleven million, eight hundred twenty-two thousand, eight hundred fifty-seven".