940009 has 4 divisors (see below), whose sum is σ = 1074304. Its totient is φ = 805716.

The previous prime is 940003. The next prime is 940019. The reversal of 940009 is 900049.

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 940009 - 2³ = 940001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (940001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67137 + ... + 67150.

It is an arithmetic number, because the mean of its divisors is an integer number (268576).

2⁹⁴⁰⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

940009 is a deficient number, since it is larger than the sum of its proper divisors (134295).

940009 is a wasteful number, since it uses less digits than its factorization.

940009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134294.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 940009 is about 969.5406128678. The cubic root of 940009 is about 97.9589235044.

The spelling of 940009 in words is "nine hundred forty thousand, nine".