11549971 has 2 divisors, whose sum is σ = 11549972. Its totient is φ = 11549970.

The previous prime is 11549963. The next prime is 11549977. The reversal of 11549971 is 17994511.

11549971 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11549971 - 2³ = 11549963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11549971.

It is not a weakly prime, because it can be changed into another prime (11549977) 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, 5774985 + 5774986.

It is an arithmetic number, because the mean of its divisors is an integer number (5774986).

Almost surely, 2^11549971 is an apocalyptic number.

11549971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11549971 is an equidigital number, since it uses as much as digits as its factorization.

11549971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 37.

The square root of 11549971 is about 3398.5248270389. The cubic root of 11549971 is about 226.0443369823.

It can be divided in two parts, 115 and 49971, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 11549971 in words is "eleven million, five hundred forty-nine thousand, nine hundred seventy-one".