11940009 has 4 divisors (see below), whose sum is σ = 15920016. Its totient is φ = 7960004.

The previous prime is 11939959. The next prime is 11940017. The reversal of 11940009 is 90004911.

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 11940009 - 2⁷ = 11939881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11940029) 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 in 3 ways as a sum of consecutive naturals, for example, 1989999 + ... + 1990004.

It is an arithmetic number, because the mean of its divisors is an integer number (3980004).

Almost surely, 2^11940009 is an apocalyptic number.

It is an amenable number.

11940009 is a deficient number, since it is larger than the sum of its proper divisors (3980007).

11940009 is an equidigital number, since it uses as much as digits as its factorization.

11940009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980006.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 11940009 is about 3455.4318109319. The cubic root of 11940009 is about 228.5606967990.

The spelling of 11940009 in words is "eleven million, nine hundred forty thousand, nine".