11999291 has 2 divisors, whose sum is σ = 11999292. Its totient is φ = 11999290.

The previous prime is 11999257. The next prime is 11999293. The reversal of 11999291 is 19299911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11999291 - 2¹⁸ = 11737147 is a prime.

Together with 11999293, 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 (11999293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999645 + 5999646.

It is an arithmetic number, because the mean of its divisors is an integer number (5999646).

Almost surely, 2^11999291 is an apocalyptic number.

11999291 is a deficient number, since it is larger than the sum of its proper divisors (1).

11999291 is an equidigital number, since it uses as much as digits as its factorization.

11999291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 41.

The square root of 11999291 is about 3463.9992782909. Note that the first 3 decimals coincide. The cubic root of 11999291 is about 228.9383395197.

The spelling of 11999291 in words is "eleven million, nine hundred ninety-nine thousand, two hundred ninety-one".