2670809 has 2 divisors, whose sum is σ = 2670810. Its totient is φ = 2670808.

The previous prime is 2670797. The next prime is 2670817. The reversal of 2670809 is 9080762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2371600 + 299209 = 1540^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2670809 - 2⁴ = 2670793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2670709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335404 + 1335405.

It is an arithmetic number, because the mean of its divisors is an integer number (1335405).

2^2670809 is an apocalyptic number.

It is an amenable number.

2670809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2670809 is an equidigital number, since it uses as much as digits as its factorization.

2670809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 2670809 is about 1634.2609950678. The cubic root of 2670809 is about 138.7440210610.

The spelling of 2670809 in words is "two million, six hundred seventy thousand, eight hundred nine".