11249809 has 2 divisors, whose sum is σ = 11249810. Its totient is φ = 11249808.

The previous prime is 11249759. The next prime is 11249827. The reversal of 11249809 is 90894211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8427409 + 2822400 = 2903^2 + 1680^2 .

It is a cyclic number.

It is not a de Polignac number, because 11249809 - 2⁹ = 11249297 is a prime.

It is not a weakly prime, because it can be changed into another prime (11249899) 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, 5624904 + 5624905.

It is an arithmetic number, because the mean of its divisors is an integer number (5624905).

Almost surely, 2^11249809 is an apocalyptic number.

It is an amenable number.

11249809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11249809 is an equidigital number, since it uses as much as digits as its factorization.

11249809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 11249809 is about 3354.0734935299. The cubic root of 11249809 is about 224.0689692491.

The spelling of 11249809 in words is "eleven million, two hundred forty-nine thousand, eight hundred nine".