11471939 has 2 divisors, whose sum is σ = 11471940. Its totient is φ = 11471938.

The previous prime is 11471909. The next prime is 11471947. The reversal of 11471939 is 93917411.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11471939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11471899 and 11471908.

It is not a weakly prime, because it can be changed into another prime (11471909) 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, 5735969 + 5735970.

It is an arithmetic number, because the mean of its divisors is an integer number (5735970).

Almost surely, 2^11471939 is an apocalyptic number.

11471939 is a deficient number, since it is larger than the sum of its proper divisors (1).

11471939 is an equidigital number, since it uses as much as digits as its factorization.

11471939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 11471939 is about 3387.0250958621. The cubic root of 11471939 is about 225.5341318338.

The spelling of 11471939 in words is "eleven million, four hundred seventy-one thousand, nine hundred thirty-nine".