11445809 has 4 divisors (see below), whose sum is σ = 12048240. Its totient is φ = 10843380.

The previous prime is 11445803. The next prime is 11445817. The reversal of 11445809 is 90854411.

11445809 is digitally balanced in base 2, because in such base 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11445809 - 2¹² = 11441713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11445803) 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, 301187 + ... + 301224.

It is an arithmetic number, because the mean of its divisors is an integer number (3012060).

Almost surely, 2^11445809 is an apocalyptic number.

11445809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11445809 is a deficient number, since it is larger than the sum of its proper divisors (602431).

11445809 is an equidigital number, since it uses as much as digits as its factorization.

11445809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602430.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 11445809 is about 3383.1655295004. The cubic root of 11445809 is about 225.3627662400.

The spelling of 11445809 in words is "eleven million, four hundred forty-five thousand, eight hundred nine".