2207009 has 12 divisors (see below), whose sum is σ = 2606724. Its totient is φ = 1862784.

The previous prime is 2206999. The next prime is 2207017. The reversal of 2207009 is 9007022.

2207009 = 43² + 44² + ... + 188².

It can be written as a sum of positive squares in 2 ways, for example, as 529984 + 1677025 = 728^2 + 1295^2 .

It is not a de Polignac number, because 2207009 - 2⁴ = 2206993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2207039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3269 + ... + 3885.

It is an arithmetic number, because the mean of its divisors is an integer number (217227).

2^2207009 is an apocalyptic number.

It is an amenable number.

2207009 is a deficient number, since it is larger than the sum of its proper divisors (399715).

2207009 is an equidigital number, since it uses as much as digits as its factorization.

2207009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 2207009 is about 1485.6005519654. The cubic root of 2207009 is about 130.1971171366.

The spelling of 2207009 in words is "two million, two hundred seven thousand, nine".