11922847 has 2 divisors, whose sum is σ = 11922848. Its totient is φ = 11922846.

The previous prime is 11922829. The next prime is 11922853. The reversal of 11922847 is 74822911.

It is a strong prime.

It is an emirp because it is prime and its reverse (74822911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11922847 - 2⁷ = 11922719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11922347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5961423 + 5961424.

It is an arithmetic number, because the mean of its divisors is an integer number (5961424).

Almost surely, 2^11922847 is an apocalyptic number.

11922847 is a deficient number, since it is larger than the sum of its proper divisors (1).

11922847 is an equidigital number, since it uses as much as digits as its factorization.

11922847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 11922847 is about 3452.9475814150. The cubic root of 11922847 is about 228.4511368719.

It can be divided in two parts, 11922 and 847, that added together give a square (12769 = 113²).

The spelling of 11922847 in words is "eleven million, nine hundred twenty-two thousand, eight hundred forty-seven".