2240009 has 4 divisors (see below), whose sum is σ = 2244816. Its totient is φ = 2235204.

The previous prime is 2240003. The next prime is 2240023. The reversal of 2240009 is 9000422.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9000422 = 2 ⋅4500211.

It is a cyclic number.

It is not a de Polignac number, because 2240009 - 2⁸ = 2239753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2240003) 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, 1619 + ... + 2664.

It is an arithmetic number, because the mean of its divisors is an integer number (561204).

2^2240009 is an apocalyptic number.

It is an amenable number.

2240009 is a deficient number, since it is larger than the sum of its proper divisors (4807).

2240009 is an equidigital number, since it uses as much as digits as its factorization.

2240009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4806.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2240009 is about 1496.6659613955. The cubic root of 2240009 is about 130.8428276430.

The spelling of 2240009 in words is "two million, two hundred forty thousand, nine".