11471309 has 2 divisors, whose sum is σ = 11471310. Its totient is φ = 11471308.

The previous prime is 11471219. The next prime is 11471323. The reversal of 11471309 is 90317411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7823209 + 3648100 = 2797^2 + 1910^2 .

It is an emirp because it is prime and its reverse (90317411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11471309 - 2¹⁶ = 11405773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11471389) 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, 5735654 + 5735655.

It is an arithmetic number, because the mean of its divisors is an integer number (5735655).

Almost surely, 2^11471309 is an apocalyptic number.

It is an amenable number.

11471309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11471309 is an equidigital number, since it uses as much as digits as its factorization.

11471309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 11471309 is about 3386.9320926172. The cubic root of 11471309 is about 225.5300032349.

The spelling of 11471309 in words is "eleven million, four hundred seventy-one thousand, three hundred nine".