11487209 has 2 divisors, whose sum is σ = 11487210. Its totient is φ = 11487208.

The previous prime is 11487197. The next prime is 11487211. The reversal of 11487209 is 90278411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6325225 + 5161984 = 2515^2 + 2272^2 .

It is a cyclic number.

It is not a de Polignac number, because 11487209 - 2⁴ = 11487193 is a prime.

Together with 11487211, 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 (11487239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5743604 + 5743605.

It is an arithmetic number, because the mean of its divisors is an integer number (5743605).

Almost surely, 2^11487209 is an apocalyptic number.

It is an amenable number.

11487209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11487209 is an equidigital number, since it uses as much as digits as its factorization.

11487209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 11487209 is about 3389.2785367981. The cubic root of 11487209 is about 225.6341550090.

The spelling of 11487209 in words is "eleven million, four hundred eighty-seven thousand, two hundred nine".