11999747 has 2 divisors, whose sum is σ = 11999748. Its totient is φ = 11999746.

The previous prime is 11999723. The next prime is 11999749. The reversal of 11999747 is 74799911.

It is a strong prime.

It is an emirp because it is prime and its reverse (74799911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11999747 - 2⁶ = 11999683 is a prime.

Together with 11999749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11999749) 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, 5999873 + 5999874.

It is an arithmetic number, because the mean of its divisors is an integer number (5999874).

Almost surely, 2^11999747 is an apocalyptic number.

11999747 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999747 is an equidigital number, since it uses as much as digits as its factorization.

11999747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 47.

The square root of 11999747 is about 3464.0650975407. The cubic root of 11999747 is about 228.9412395399.

The spelling of 11999747 in words is "eleven million, nine hundred ninety-nine thousand, seven hundred forty-seven".