11999749 has 2 divisors, whose sum is σ = 11999750. Its totient is φ = 11999748.

The previous prime is 11999747. The next prime is 11999761. The reversal of 11999749 is 94799911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7128900 + 4870849 = 2670^2 + 2207^2 .

It is a cyclic number.

It is not a de Polignac number, because 11999749 - 2¹ = 11999747 is a prime.

Together with 11999747, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11999747) 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, 5999874 + 5999875.

It is an arithmetic number, because the mean of its divisors is an integer number (5999875).

Almost surely, 2^11999749 is an apocalyptic number.

It is an amenable number.

11999749 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999749 is an equidigital number, since it uses as much as digits as its factorization.

11999749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 49.

The square root of 11999749 is about 3464.0653862189. The cubic root of 11999749 is about 228.9412522591.

The spelling of 11999749 in words is "eleven million, nine hundred ninety-nine thousand, seven hundred forty-nine".