7440009 has 4 divisors (see below), whose sum is σ = 9920016. Its totient is φ = 4960004.

The previous prime is 7439977. The next prime is 7440011. The reversal of 7440009 is 9000447.

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 7440009 - 2⁵ = 7439977 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (7440049) 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, 1239999 + ... + 1240004.

It is an arithmetic number, because the mean of its divisors is an integer number (2480004).

Almost surely, 2^7440009 is an apocalyptic number.

It is an amenable number.

7440009 is a deficient number, since it is larger than the sum of its proper divisors (2480007).

7440009 is a wasteful number, since it uses less digits than its factorization.

7440009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480006.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 7440009 is about 2727.6379891767. The cubic root of 7440009 is about 195.2200802514.

The spelling of 7440009 in words is "seven million, four hundred forty thousand, nine".