11203009 has 4 divisors (see below), whose sum is σ = 11229316. Its totient is φ = 11176704.

The previous prime is 11202991. The next prime is 11203013. The reversal of 11203009 is 90030211.

11203009 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90030211 = 23 ⋅3914357.

It can be written as a sum of positive squares in 2 ways, for example, as 3097600 + 8105409 = 1760^2 + 2847^2 .

It is a cyclic number.

It is not a de Polignac number, because 11203009 - 2¹¹ = 11200961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202983 and 11203001.

It is not an unprimeable number, because it can be changed into a prime (11203039) 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, 12504 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (2807329).

Almost surely, 2^11203009 is an apocalyptic number.

It is an amenable number.

11203009 is a deficient number, since it is larger than the sum of its proper divisors (26307).

11203009 is an equidigital number, since it uses as much as digits as its factorization.

11203009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26306.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 11203009 is about 3347.0896313066. The cubic root of 11203009 is about 223.7578231402.

The spelling of 11203009 in words is "eleven million, two hundred three thousand, nine".