11273809 has 4 divisors (see below), whose sum is σ = 11290420. Its totient is φ = 11257200.

The previous prime is 11273777. The next prime is 11273831. The reversal of 11273809 is 90837211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7273809 + 4000000 = 2697^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 11273809 - 2⁵ = 11273777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11273849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7242 + ... + 8659.

It is an arithmetic number, because the mean of its divisors is an integer number (2822605).

Almost surely, 2^11273809 is an apocalyptic number.

It is an amenable number.

11273809 is a deficient number, since it is larger than the sum of its proper divisors (16611).

11273809 is an equidigital number, since it uses as much as digits as its factorization.

11273809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16610.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 11273809 is about 3357.6493265378. The cubic root of 11273809 is about 224.2281967113.

The spelling of 11273809 in words is "eleven million, two hundred seventy-three thousand, eight hundred nine".